AccurioPress C6100 C6085 Troubleshooting Guide Ver1.2 PDF
March 21, 2023 | Author: Anonymous | Category: N/A
Short Description
Download AccurioPress C6100 C6085 Troubleshooting Guide Ver1.2 PDF...
Description
TROUBLESHOOTING GUIDE
2017.6 Ver.1.2
PP Support div.
KONICA MINOLTA MINOLTA Confidenti Confidential al
Table of contents 1. Image Image Quality 1.1 Spot spot --------------------------------------------------------------------------- 4 1.1.1 Cyclic white spot/black spot 1.1.1 1.1.2 White or color spots (fish eye) 1.1.2 eye) ------------------------------------------------------------------------ 5 1.1.3 1.1. 3 Many white spots spots ----------------------------------------------------------------------------------------- 9 1. 1.2 2 Line/band to feed directio n (FD) 1.2.1 FD line due to photoconductor drum 1.2.1 drum --------------------------------------------------------------- 10 1.2.2 Paper edge mark on fusing belt 1.2.2 belt --------------------------------------------------------------------- 13 1.2.3 FD lines due to fusing separation claw 1.2.3 claw -------------------------------- ------------------------------------------------------ 14 ------------- -----------------16 1.2.4 FD line due to intermediate transfer belt claw (Separation jam) 1.2.4 jam) --------------------------1.2.5 FD gloss line due to the paper feed belt ----------------------------------------------------------- 18 1.2.5 1.2.6 Soilage at the edge after feeding smaller size 1.2.6 size --------------------------------------------------- 20 1. 1.3 3 Line/band to cr oss directio n (CD) (CD) 1.3.1 Line like ripple on image 1.3.1 image ------------------------------------------------------------------------------- 21 1.3.2 Lighter density band (drum humidity memory) 1.3.2 /Darker Density band (NOx, Corona products, memory) memory) --------------------------------------- ----------------------------------- 23 1.3.3 Thick paper trailing edge image abnormality 1.3.3 abnormality ----------------------------------------------------- 26 1.3.4 CD line due to fusing belt 1.3.4 belt ----------------------------------------------------------------------------- 28 1.3.5 Lines or banding on thick paper (shock noise) 1.3.5 noise) ---------------------------------------------------- 29 1.3.6 CD gloss line due to width of blank space 1.3.6 space -------------------------------------------------------- 33
density) ----------------------------------------- ------------------------- 35 1.3.7 Banding in developing roller cycle (44mm, uneven density) 1.3.7 1.4 Soilage -------------------------------------------37 1.4.1 Toner contamination (spilling)/T 1.4.1 (spilling)/Toner oner scattering inside machine machine ------------1.4.2 Background while printing high coverage 1.4.2 coverage --------------------------------------------------------- 40 1.4.3 Intermediate transfer belt cleaning failure --------------------------------------------------------- 41 1.4.3 1.5 Others 1.5.1 Rough image on thin coated paper ----------------------------------------------------------------- 43 1.5.1 1.5.2 Poor fusing (Toner peeling off) occurs at specific paper type 1.5.2 type ----------------------------------------- --------------------- 44 1.5.3 Darker image at trailing edge/lighter at leading edge 1.5.3 edge ------------------------------------------ 46 1.5.4 Uneven density at halftone/uneven gloss on thick paper -------------1.5.4 -------------------------------------------------------- 52 1.5.5 Fine line blurs at the leading edge 1.5.5 edge ------------------------------------------------------------------ 55 1.5.6 Aslant 1.5.6 Aslant banding (density difference) difference) ----------------------------------------------------------------- 56 1.5.7 Wax attachment/Paper dust attachment 1.5.7 attachment ----------------------------------------------------------- 58 1.5.8 Highlight gradation changes daily 1.5.8 daily ------------------------------------------------------------------- 61 1.5.9 Color change at continuous print 1.5.9 print -------------------------------------------------------------------- 62 1.5.10 Gloss memory ------------------------------------------------------------------------------------------ 63 1.5.10 1.5.11 Image density is lighter on uncoated paper ----------------------------------------------------- 65 1.5.11 1.5.12 Thin line is fainted 1.5.12 fainted ------------------------------------------------------------------------------------- 73 1.5.13 Image off centered in Cross Direction (m 1.5.13 (main ain scan direction) direction) ------------------------------------------------------------- 76 1.5.14 Uneven gloss on thick paper ------------------------------------------------------------------------ 77 1.5.14 1.5.15 Photoconductor memory ----------------------------------------------------------------------------- 78 1.5.15 Uneven desnity like earthwormgloss ------------------------------------------------------------- 80 1.5.16 Uneven 1.5.16 1.5.17 Wavy uneven density at the edge ---------------------------------------------------------------- 82 1.5.17 paper) -------------------------------------------------------------------- 83 1.5.18 Emboss paper (textured paper) 1.5.18 1.6 Troubleshooti ng by usi ng CSRA CSRA 1.6.1 Darker/Lighter image density and background 1.6.1 back ground (CSRA approach) -------------------------------------------------- 85
-1-
KONICA MINOLTA MINOLTA Confidenti Confidential al
2. Paper Paper Conveyance Conv eyance failur e 2.1 Paper Paper Conv eyance 2.1.1 Paper wave / Paper curl ------------------------------------------------------------------------------- 89 2.1.1 2.1.2 Fusing wrapping jam 2.1.2 jam ----------------------------------------------------------------------------------- 91 2.1.3 Vertical Conveyance jam (J-1619) and corner folded (dog ear) 2.1.3 ear) ------------------------------------------ -----------------93 2.1.4 2.1. 4 Light hitting mark at edge of thick paper ----------------------------------------------------------- 94 2.1.5 120 x 235 mm size envelope corner folding (dog ear) at the machine rear side 2.1.5 side ---------- 96 2.1.6 Image lacking for the max print size 2.1.6 si ze ----------------------------------------------------------------- 98 nd
2.1.7 Separation 2.1.7 Paper wrinkle on the 2 side side -----------------------------------------------------------------------100 failure at the 2nd transfer belt (J-3102/ 2.1.8 2.1.8 Fusing wrinkle/corner folding at lead edge) edge) ------------------------------------------------------ 102
2.2 Paper Pickup 2.2.1 Corner folding (dog ear) of small size paper -------------------------------- -------------------- 104 2.2.1 edge -------------------------------------------------------------------------- 105 2.2.2 Wrinkle at the trailing edge 2.2.2 2.2.3 Pickup jam clearance workflow 2.2.3 workflow -------------------------------------------------------------------- 106 2.2.4 Thick paper jam due to multi-feed 2.2.4 multi-feed ----------------------------------------------------------------- 126 2.2.5 J-1618/1620/1622 (PFU No feed jam as paper does not reach to PFU exit sensor) 2.2.5 sensor) -- 127 127
2.3 Paper ejection 2.3.1 Paper stick with each other due to static electricity 2.3.1 electricity ------------------------------------------- 128 2.3.2 Static Sticking in Options 2.3.2 Options ---------------------------------------------------------------------------- 132 2. 2.4 4 Troubleshootin g by us ing CSRA 2.4.1 2.4. 1 J-16xx (CSRA approach) approach) ----------------------------------------------------------------------------- 135
3. Machine Machine Troubl e 3.1 Control 3.1.1 Long waiting time for mixed media 3.1.1 media ---------------------------------------------------------------- 139 3.1.2 Dehumidifying indication and unable to start print 3.1.2 print -------------------------------------------- 141 3.2 Error Code 3.2.1 C-3xxx(Fusing related error) ------------------------------------------------------------------------ 142 3.2.1 3.2.2 C-2235/4641/4642/4643 (Density on front side lighter than back side) 3.2.2 side) ------------------------------ ----- 147 3.2.3 C-2211/2212/2213/2214 (Drum motor error) 3.2.3 error) --------------------------------------------------- 149 3.3 Other Other s 3.3.1 Fusing unit frame breaks 3.3.1 breaks ---------------------------------------------------------------------------- 150 3.3.2 Unable 3.3.2 Unable to pull out the process mount ------------------------------------------------------------ 153
4. Option Trouble 4.1 SD-513 4.1.1 Clamp door open/close issue ---------------------------------------------------------------------- 154 4.1.1 4.1.2 Entrance conveyance section JAM (wavy curl paper) --------------------------------------- 155 4.1.2 4.1.3 Booklet edge soilage (machine front side) ------------------------------------------------------ 156 4.1.3 4.1.4 4-stitch booklet fold line at trail edge ------------------------------------------------------------- 157 4.1.4 4.1.5 How to calculate Fore-edge trimming adjustment value ------------------------------------- 158 4.1.5 4.1.6 Fore-edge trimming section (corner) paper torn-up/cutting shortage 4.1.6 shortage --------------------- 160 4.2 FD-504 FD-504 4.2.1 Slitter JAM/SC caused by inputting wrong Custom 4.2.1 Custo m size ------------------------------------- 161 4.2.2 How to clear slitter scrap JAM --------------------------------------------------------------------- 163 4.2.2 4.3 TU-503 4.3.1 Booklet side soilage at clamping 4.3.1 clamping ------------------------------------------------------------------ 165 4.4 IQ-501
-2-
KONICA MINOLTA MINOLTA Confidenti Confidential al 4.4.1 IQ-501 4.4.1 IQ-501 Spot was detected.. message remains ------------------------------------------------ 166
-3-
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.1. 1.1. 1. Cyclic w hite spot/black spo t/black spot s pot 1. (1) Symptom White spot/black spot repeatedly occurs at a certain cycle. (2) Cause (a) Drum unit Approx. 251mm cycle in a single color
(b) Developing unit Approx. 43.5mm cycle in a single color (c) Intermediate transfer belt Approx. 1066mm cycle. On A3 (420mm) simplex printing, the symptom occurs approx. every 3 sheets. (d) 2nd transfer belt Approx. 195mm cycle (e) 1st transfer roller Approx. 70mm cycle (f) 2nd transfer roller/Up Approx. 120mm cycle nd
(g) 2 transfer roller/Lw Approx. 120mm cycle (h) Intermediate transfer drive roller Approx. 120mm cycle (i) Fusing upper belt Approx. 377mm cycle. The symptom occurs on 1st side at simplex printing. (i) Heating Roller Approx. 182mm cycle. The symptom occurs on 1st side at simplex printing. (j) Fusing lower roller Approx. 220mm cycle. st
The symptom occurs on 1 side at duplex printing. (3) Solution 1. Print Print test patter No. 43. Specify what color has the problem. Access Service mode, press [Test [Test Mode]→[T Mode]→[Test est Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 43 [Gradation-Y]: 0 [Gradation-M]: 0 [Gradation-C]: 0 [Gradation-K]: 0 Press [Print Mode] then print on A3.
2. After specifying the problem parts, replace the subject parts. Table of contents contents
-4-
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.1. 1.2. 2. White or c olor spot s (fish (fis h eye) 1. (1) Symptom •White spots At solid part, white spots with unsharpness outline appear. Especially,, it is noticeable on the multi-color with high contrast like Especially lik e Y100% and K100%. •Color spots At solid part, the darker spots with unsharpness outline appear. (Color spots with a core forming line)
A kind of color spots like following photo on right side appears. There is a core forming line in color spot. Due to that, that, the darker spots appear. (Note) For both color spots and white spots, usually the core spot is seen at the center.
White spots
Color spots
Color spots with a core forming line
(2) Cause •While pulling out/pushing back the process mount or ADU mount, the developer or toner clump falls down on the image creation process path and paper feed path •White spots Around the developer attaching to the image creation process path, the DU and intermediate transfer belt cannot contact well and toner is not transferred. •Color spots The toner transferred on the intermediate transfer belt be lt slightly returns to the next color drum but the toner around the developer does not return.
White spots
Color spots Next color
-5-
KONICA MINOLTA MINOLTA Confidenti Confidential al (Color spots with a core forming line) When shaking a toner bottle in wrong way, the toner sometimes entered to the accordion part of toner bottle head. The toner in the accordion part is compressed when inserting the toner bottle to the machin machine. e. Then, the to toner ner clump is made. When printing halftone halftone image image or others, the clump may appear as the spots with core forming line. (Close condition of toner bottle vent)
(Open condition of toner bottle vent)
(Cross-section diagram/Close)
(Cross-section diagram/Open)
The toner in accordion part is compressed
-6-
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution 1. Check and clean the soilage o on n the developing unit (especially the top cover of the developing unit and adjacent process mount), DU (especially top cover) and paper path. *Clean the following parts with every 350,000 interval (Replaced timing of drum unit) as service manual.
A top cover of developer unit
Adjacent process mount
Drum stay (top cover)
2. To To prevent the color spot spots s with a core forming line, explain the th e customer (Operator) the correct procedure indicated in the product package. *As shown in the procedure on toner bottle package .
-7-
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. If the improvement up to step 2 is not enough, change Front & Back Density setting (1st Transfer Y/M/C/K). [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Front & Back Density] White spots: Change setting by every +5 and see the result. Color spots: Change setting by every -5 and see the result.
Table of contents contents
-8-
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.1.3 .3.. Many Many whit w hit e spot s 1.1 (1) Symptom Many white spots in φ 0.1mm 0.1m m to 1mm size appear on any color. The symptom tends to occur under following environment. •Side2 of duplex print •Low humidity •More occurrence on recycled and high quality paper than coated pa paper. per. (2) Cause When toner is transferred from intermediate transfer belt to the paper while the resistance on the paper is not even, abnormal discharge occurs at the nipping part of 2 nd transfer. The toner at the abnormal discharged part is not transferred to the paper and white spots occur. (3) Solution 1. Change the 2 nd Transfer Transfer Output Adj. setting to + value. depending on the problem occurring side.
Enter the value by 10 increments
• [Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj. (Front)] • [Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj. (Back)]
Note: When the Expert Adj. is not indicated, change the DIPSW1-0 (To show Expert Adjustment in the Paper Setting) from “0” to “1” (Show).
2. When the paper is exposed to the low humid ambient air or left in the PFU, the occurrence tends to increase. In that case, use the paper just unpacked from the package. contents Table of contents
-9-
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2. 2.1. 1. FD line due to photo ph otocond cond uct or drum d rum 1. (1) Symptom White line may occur due to cleaning failure of the drum unit The occurrence increases under high coverage, low humidity environment.
Feed direction
搬送方向
(2) Cause The lubricant material is not applied evenly on the drum unit. (3) Solution 1. Print image sample (test pattern No.43) and check on what color does symptom occur. Access [Service Mode], press [Test [Test Mode]→[T Mode]→[Test est Pattern Output Mode].
Enter the following value [T [Test est pattern]: 43 [Gradation-Y]: 0 [Gradation-M]: 0 [Gradation-C]: 0 [Gradation-K]: 0 Press [Print Mode] and print on A3. 2. Conduct charging corona unit cleaning mode. Select the target color from the following then press [Start] button to start adjustment. Service mode→[Process Adjustment]→[Drum Peculiarity Adj]→[Charging Cleaning]
Select the subject color and press Start button.
Note: Do not conduct the Charging Cleaning more than 4 times continuously. 3. After the end of the cleaning, clean ing, print the image and check whether the symptom has been improved. Press [Print Mode] then print image on the A3 paper.
- 10 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
After confirming confirming the cleaning completes, press [Print Mode] button.
Note: At the print mode of Charge cleaning, YMCK mixed sample is printed. The test pattern No.53 can be also used to check the effect. (In case of Bk) Access Service Mode, press [Test Mode]→[T Mode]→[Test est Pattern Output Mode] [Test Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]:0 [Gradation-C]:0 [Gradation-K]:120 Press [Print Mode] then print on A3. Note Enter the gradation for the subject color. 4. If the line does not n ot disappear, conduct the Drum Refresh mode. After pressing both buttons one by one then returning to the normal screen, adjustment is conducted. [Adjustment]→[Execute Adjust Operation]→[Drum Refresh Mode]
* Note: • Do not perform refresh mode for the brand new drum. Otherwise, the cleaning blade or the photoconductor drum may get damage because the lubricant on the drum dr um may not be enough.
- 11 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 5. For subject color, print test pattern No. 53 again and check if the symptom is improved. Enter the following value (In case of Bk) Press [Service [Ser vice Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode] [Test Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]: 0 [Gradation-C]: 0 [Gradation-K]: 120 Mode] then print on A3. *Press Note:[Print Enter gradation for th the e subject color. 6. If still the line remains, replace the subject color drum unit. Table of contents contents
- 12 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2.2 .2.. Paper Paper edge mark on f us usin ing g belt 1.2 (1) Symptom When the current paper size is wider in main scan direction (CD) than previous job, the line in feed direction (FD) occurs at the location corresponding to the previous paper edge. The symptom also occurs for the EF-104 (a fusing unit for the envelope) (2) Cause The fusing belt surface gets gets rough. The roughened part appears as the difference of gloss and looks like line line in FD. It tends to occur after printing on paper contains much paper dusts dusts or thick paper which gives big stress to the fusing belt. (3) Solution 1. Conduct fusing refresh mode. When the following button is pressed then returned to the normal screen, the adjustment is executed au automatically tomatically.. [Adjustment]→[Execute Adjust Operation]→[Fusing Refresh Mode]
2. After conducting fusing refresh mode, print test pattern No.53 and check if the symptom is improved. Press [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Ou Output tput Mode] [T [Test est Pattern] Pattern]:: 53 [Gradation-Y]: 0 [Gradation-M]: 0 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] and print on A3. 3. If the improvement is not enough, conduct fusing refresh mode. [Adjustment]→[Execute Adjust Operation]→[Fusing Refresh Mode] Note When Fusing refresh mode is is repeated too much, fine gloss lines may occur. So, the maximum is the twice. 4. When the improvement up to step 3 is not enough, print the larger width paper than the width between the paper edge marks. After printing 50 sheets for duplex by using normal paper (rough surface paper is more effective than coated paper), check image quality and confirm the improvement. If improvement improvement is not enough, print out again with same settings. Note When the thick paper or the envelope of the same size is fed continuously, try to conduct the fusing refresh mode in the certain interval. It will help to minimize the damage on the belt. In case of the 350g/m2 or heavier paper, 5kp interval to conduct fusing refresh mode is recommended. For the use of envelope, 30kp interval is recommended.
Table of contents contents
- 13 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2. 2.3. 3. FD lines due to fus fusing ing separa separatio tion n claw c law 1. (1) Symptom When printing on thin paper with duplex setting, separation claw mark (lien in FD) may occurs on Side 1.
Feed direction
Approx. 35mm interval
(2) Cause When printing on thin paper (soft paper), the separation air let the paper be pressed by the
separation claw, causing the scratching line on the Side1. (3) Solution 1. To reduce the temperature of the lower roller at the timing coated paper starts to enter the fusing unit, change the [Prior Paper Type] from "Others" to "Plain". [User Setting]→[Common Setting]→[Prior Paper Type]
2. Select [Weak] for [Fusing Air Separation Air level setting] to reduce air level. [Paper Setting]→[Change Set]→[Expert Adj.]→[F using Air Separation Air Level Setting]
Note ･When the Expert Adj. is not indicated, change the DIPSW1-0 (To show Expert adjustment in the Paper Setting) from ”0” to “1” (Show). ･The side effect of changing air level is as follows: ･Fusing separation failure as air level is decreased (When much toner is attached to the leading edge of the paper)
- 14 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Decrease the fusing temperature by 5 ºC step and check effect (Maximum -10 ºC) [Paper Setting]→[Change Set]→[Expert Adj.] ･[Fus. T-Belt Center Temp (Print)] ･[Fus. T-Belt Edge Temp (Print)] ･[L-Fus. PressRoller Center(Print)] Note: • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. Table of contents
- 15 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2.4. FD line due to intermediate transfer belt claw (Separation jam) (1) Symptom White line in feed direction (FD) occurs at halftone.
Feed direction
Approx. 85mm interval
(2) Cause When the leading edge passes the 2 nd transfer unit, three claws of the intermediate transfer belt
contact with the intermediate transfer belt. At that time, if too much stress is given, the intermediate transfer belt surface gets scratched or filming due to toner occurs. (3) Solution 1. On [Int. Transfer Separation], change the setting from “Auto” (Default) to “OFF”. [Paper Setting]→[Change Set]→[Expert Adj.]→[Int. Transfer Separation]
- 16 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Note • When the Expert Adj. is not indicated, change the DIPSW1-0 (To show Expert adjustment in the Paper Setting) from “0” to “1” (Show). • When the intermediate transfer separation claw is always released, wrapping jam of thin paper may occur. occur. If the operator does not aware the the jam paper and recover the jam, the paper may enter to the intermediate transfer cleaning unit. • Even if the paper weight is 62gsm or over when the stiffness is low or very curled paper is used, separation failure may occur. occur. In that case, set [Int. Transfer Separation] to ON and register the setting to the paper profile. [Paper Setting]→[Change Set]→[Process Adj.]→[Int. Transfer Separation] • The default setting of [Int. Transfer S Separation] eparation] is “Auto “Auto”. ”. The separation claw press/release status by the paper weight is as follows.
Intermediate transfer separation claw pressed/released ON
Paper weight (gsm) 52-61 62-74 75-80 81-91 92-105 106-135 136-176 177-216 217-256
OFF
257-300 301-350 351-400 Table of contents contents
- 17 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2.5 .5.. FD FD gloss glos s li ne due to t he paper feed belt 1.2 (1) Symptom 61mm m from the center center of the coated paper. It tends The gloss lines in FD direction appears at the ± 61m to occur when the heavy coated paper is used. The gloss line is made by the friction between the surface of the paper and the edge of the paper feed belt at outside.
Center of paper
Distance between lines: 122mm (±61mm from paper center)
Does not occur at leading edge of paper
Feed Direction Direction
(2) Cause When the PF-707m/711 feed belt suctions paper, the friction is generated between the belt and paper and friction mark is left on the paper.
Left side
Paper
Gap height: 5mm
- 18 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution 1. In the Expert Adjustment, change the suction air level l evel of the paper suction fan. f an. [Paper Setting]→[Change Set]→[ Expert Adj.]→[PFU Suction Level Setting] • [Weak]: Weaken the the suction suction power of the paper suction fan. • [Auto]: Return to the default suction power. • [Strong]: Strengthen the suction power of the paper suction fan.
Change the setting value to [Weak] direction by every – 3 step ste p until the symptom is improved.
Note: ･When the Expert Adj. is not indicated, change the DIPSW1-0 (To (To show Expert adjustment in the Paper Setting) from ”0” to “1” (Show). ･When the PFU Suction Air level is set too weak, the paper is not suctioned enough and pick-up jam may occur. occur. ・ When the jam occurs after changing the setting to [Weak], move the upper sensor position adjustment lever to upward to fix the air outlet position.
Table of contents contents
- 19 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.2.6 .6.. Soil Soil age at at t he edge after feeding sm smaller aller si ze 1.2 (1) Symptom When the paper size of the current job is larger in the cross direction (main scan direction) than previous job, the soilage appears at the non-image area of the previous job. (2) Cause During large volume printing of small size paper, slight amount of the toner and paper dust attaches to the surface of the fusing belt then accumulates. It attaches to the large size paper and appears as the soilage.
At non-image area of the fusing belt surface, the toner and paper dust attaches. Photo shows the case after feeding 500k of the same size continuously.
(3) Solution Print the single color solid on the large large size by 5 sheets and check if the symptom improves. improves. not, repeat the print.
Note: When the 2 or more color solid is printed repeatedly, the fusing separation problem may ma y occur. Also the blank sheet has less cleaning effect. So, single color solid is recommended. contents Table of contents
- 20 -
If
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3. 3.1. 1. Line li ke ripp le on image 1. (1) Symptom Unevenness in the main scan direction (CD) in upstream color occurs on solid image of secondary color (or more).
Feed Direction
(2) Cause •When toner charge is increased under the low humidity environment, the leak occurs at the 1 st transfer section. •When the density is high at the solid secondary color section, the leak occurs at the 1 st transfer section (3) Solution 1. Perform the gamma automatic adjustment [Service]→[Process Adjustment]
Adjustment]→[Drum
Peculiarity
Adjustment]→[Gamma
Automatic
2. Change the Neutralizing Output (Dis-Elec. Output) setting from [Standard] to [Condition 1]. and check the image. (Check the image with symptom) [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[1st Trans. Dis-Elec. Output]
3. If the symptom is not improved by performing the step 2, set the [1st Trans. Dis-Elec. Output] back to [Standard].
- 21 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 4. On [Front & Back Setting], change the 1 st transfer current setting by 5 steps increments for the subject color then check the image. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Front & Back Setting]
Note • When this method failed to improve the symptom, try adjusting by decreasing it. • As changing the 1 st transfer current, photo conductor memory may occur (image remains at 251mm interval). If this symptom is confirmed, change the [Dis-elec. Pole Output] to [Condition 2]. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Setting]→[Process Adjustment]→[1st Trans. Dis-Elec. Output] 5. After performing the above steps 1 to 4, and still the symptom is not improved, reset the [Front & Setting] to 0 which was color changed at steps step 4. thesymptom color produced, and decrease theBack maximum density of single by -2 andBased check on if the is improved [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Maximum Density Adjustment]
Table of contents contents
- 22 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3.2 Lighter density band (drum humidity memory)/Darker Density band (NOx, (NOx, Coro Corona na produc ts, memory) (1) Symptom 1) Drum humidity memory In main scan direction (CD), approx. 37mm width lighter density band appears at approx. 251mm interval. The width of the band corresponds with the distance between blades.
Approx. 37mm Approx. 251mm
Paper feed direction
2) NOx (Corona products) memory In main scan direction (CD), darker density band appears at approx. 251mm interval. The density change point is clear at leading edge side and it gradually disappears at the trailing edge side. Once the symptom occurs, it continues 2 to 3 days. Approx. 251mm
Paper feed direction
(2) Cause 1) Drum humidity memory Transfer ability (developing ability) deteriorates in the cycle of drum rotation if there is a humidity difference on the drum surface between the transfer belt side and the write unit side. It tends to occur on first f irst copies after machine is switched ON in the morning.
2) NOx (Corona products) memory When the corona products, NOx, stays long period around the drum unit, the NOx enters to the photoconductor layer of the drum and changes the drum potential. Consequently, it causes darker density band in drum cycle. The symptom tends to occur if the power switch of the machine is turned OFF just after printing and kept turn OFF for several days (more than 4 days). The effect remains until the NOx in the photoconductor layer disappears.
- 23 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution 1) Drum humidity memory 1. From the service mode or Utility menu, perform the automatic gamma adjustment then check whether the symptom is improved. (Repeat several times and check the result) [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Gamma Automatic Adjustment] [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Execute Adjust Operation]→[Gamma Automatic Adj.]
2. To To prevent future occurre occurrence, nce, change photoconductor drum small rotation interval shorter. Change the setting from 3 minutes (Default) to 1 minute. minute. If the effect is not enough, select much shorter setting (30 sec to 10 sec) [Service]→[Process Adjustment]→[Interval/Quantity Adj.]→[Drum Small Rotation Interval] * Note:
Photoconductor life gets shorter.
2) NOx (Corona products) memory 1. It is difficult to let the NOx go out from the photoconductor layer. Therefore, it is difficult to take action once the symptom occurs. Therefore, remove NOx from drum before turning OFF the power switch of the machine. [Solution 1] Request customer to to turn OFF the power switch after 1hour from the last print. (The longer, longer, the more effective.) Auto shut of offf function function may be helpful: Set auto shut off off to 1hour or longer. [Utility/Counter]→[User Setting]→[System Setting]→[Power Save Setting]→[Power Save Function Setting]→[Auto Shut Off]
- 24 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
[Solution 2] To shorten the time, pull out the process mount and remove the intermediate transfer unit and ventilate the DU neutralization corona to remove NOx products. Note: Minimize the light exposure of the DU. Take action quickly quickly.. contents Table of contents
- 25 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3. 3.3. 3. Thick paper trailin g edge image abnorm ality ality 1. (1) Symptom Image abnormality occurs around 6 mm from fr om the trailing edge of thick paper.
Paper feeding direction
(2) Cause When the trailing edge of paper pushes up the intermediate transfer belt, the 2nd transfer roller /Lw's winding winding section of the intermediate transfer belt changes. This creates the small gap between paper and belt then abnormal discharge occurs there. there. Consequently, Consequently, abnormal image
appears at the trailing edge. (a) Occurrence condition ・Paper is very stiff ・Printing Bk halftone under low humidity
2nd transfer roller/Up
Paper
2nd transfer roller/Lw
(3) Solution 1. Increase the setting by 10 steps for 2 nd transfer output Adjustment. Adjustment. •[Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj. (Front)] •[Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj. (Back)]
Note: •When the Expert Adj. is not indicated, change the DIPSW1-0 (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). •When the setting is increased too much, poor transfer may occur on the secondar secondary y or more color.
- 26 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 2. When step 1 is not enough and toner to ner repelling occurs at the trailing edge in b black lack halftone, change Thick paper Bk mode to [ON]. [Paper Setting]→[Change Set]→[Expert Adj.]→[Thick Bk Mode] Even if printing single black color, YMC 1st transfer rollers are in pressed state and intermediate transfer belt tension is kept high to prevent the belt gets loosen when the thick paper enters to the nipping part of the 2nd transfer unit. Note • When the Expert Adj. is not indicated, change the DIPSW1-0 DIPSW1- 0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). • When performing this setting, even the image is single black, yellow, magenta and cyan related parts (charging corona, drum unit, developing unit and 1st transfer roller) is consumed. Therefore, be sure to turn OFF [Thick Paper BK Mode] when it is not necessary or register the setting to the paper profile for the specific paper so that it works only for the specified case.
3. When step step 2 is is not enough, or not applicable, change the paper setting direction. direction. Toner repelling at the trailing edge may change depending on how the paper curls. Up convex curl is favorable.
Up convex curl: favorable
Down convex curl: not favorable
4. When step 3 is not enough, change the paper grain direction. when the paper grain runs vertical to the feed direction.
Symptom may be be improved
5. When step 4 is not enough, increase the trailing edge margin. [Paper Setting]→[Change Set]→[Both Sides Adj.]→[Image Shift] Note When enough edge margin is not available for Image Shift, ask your users to use 1 size larger paper to increase margin. margin. 6. When step 5 is not enough, adjust the [Rear Edge Erase Quantity] to be 0 to 20mm. [Paper Setting]→[Change Set]→[Expert Adj.]→[Rear Edge Erase Quantity] Note ･Do not use the paper stored in the low humidity environment. ･Moisture content of paper is a factor which which affects the toner repelling at the ttrailing railing edge. moisture content is low, the toner repelling at the trailing tr ailing edge tends to go worse. worse. Table of contents contents
- 27 -
If the
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3.4 .4.. CD CD line due to f us usin ing g belt 1.3 (1) Symptom Many fine gloss lines in CD direction appears.
Feed direction
(2) Cause While printing high coverage image continuously, the wax component in the toner attaches to the fusing belt. When the paper edge scrapes off the attached wax, the gloss level becomes different different and causing lines in CD. • This occurs only at the continuous print of high coverage. • It occurs on the normal paper but not on coated paper. (3) Solution
1. Conduct fusing refresh mode. When the following following button is pressed then returning to the normal screen, the adjustment is executed automatically. [Adjustment]→[Execute Adjust Operation]→[Fusing Refresh Mode]
2. After conducting fusing refresh mode, print test pattern No.53 and check if the symptom is improved. (For Bk) [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode] [Test Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]: 0 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on A3.
3. It the improvement is not enough, conduct fusing refresh mode again. [Adjustment]→[Execute Adjust Operation]→[Fusing Refresh Mode] Note When Fusing refresh mode is repeated too much, fine gloss lines may occur. So, the maximum is the twice. 4. If the improvement up to step 3 is not enough, print on the paper larger lar ger in width than the CD lines occurring paper. contents Table of contents
- 28 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3. 3.5. 5. Lines or b anding on t hick p ape aperr (shock n ois oise) e) 1. (1) Symptom On the thick or the hard paper, white or color lines to CD (main scan direction) occurs
A Feed direction B C
Area
Distance of leading edge (mm) 20
A 36.7 135.7 B
150 167.2
C
266.2
Symptom When the paper enters to the 2nd transfer unit, the 2nd transfer unit shifts. When the leading edge of the previous sheet exit from the 2nd transfer, the 1st transfer shifts. When the leading edge of the paper enters to the 2nd transfer, the 1st transfer shifts. When the leading edge enters to the fusing unit, the 2nd transfer shifts. When the trailing edge of the 2nd transfer passes the writing position moves. When the leading edge of the paper enters to the 2nd transfer, the exposure becomes unstable.
(2) Cause • Shock is given to the 2 nd transfer because of paper behavior. When the paper enters to the fusing unit or exit the registration guide plate, the force relation transfer. This may cause shi shifting fting at the 2nd transfer. Or if it is conveyed to changes at the 2 nd transfer. the intermediate transfer belt, shifting occurs at the 1st transfer or writing position on the drum.
• The speed difference of parts between fusing unit and the 2nd transfer. transf er. Depending on the paper hardness, the paper is pulled, pushed or goes back between the 2nd transfer and fusing unit. Consequently, Consequently, the 2nd transfer shifts occurs. occurs. Or ifif it is conveyed to the st intermediate transfer belt, shifting occurs at the 1 transfer unit or writing position on the drum. • Paper behavior between registration unit and the 2 nd transfer unit Depending on the paper position between registration and the 2 nd transfer unit, the paper which is just before the 2 nd transfer nipping is pulled or pushed or goes back between registration unit.. It is conveyed to the transfer belt and shifting occurs at the 1st transfer and writing position on the drum.
- 29 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (Reference) (a) Mechanism of shifting at 2nd transfer • Fusing roller speed < Registration roller speed (2nd transfer roller speed) 2nd transfer roller Vt
Goes back
Registration roller Vr
Fusing roller Vf
Depending on the the hardness of the paper, loop nd between the 2 transfer and fusing unit is released and shifting occurs on the 2nd transfer.
The loop isnd transfer formed between the 2 and fusing unit
• Fusing roller speed > Registration roller speed (2nd transfer roller speed) 2nd transfer roller Vt
Fusing roller Vf
Pulled
Registration roller Vr
The paper is pulled by 2nd transfer and fusing
The fusing pulls paper and shifting occurs on the 2nd transfer
(b) Mechanism of the 1st transfer shifting
Intermediate transfer belt
Vb
Vd
Drum
1st transfer position
At the 1st transfer position, the shifting occurs due to the speed difference between the intermediate transfer belt and photoconductor drum. Belt speed > Drum speed : Transferred as white line Belt speed < Drum speed : Transferred as black line The width of lines depends on the frequency and appears as sharp line or wide band. (c) Mechanism of shifting at writing position Vd
Drum Vd± Δ Vd
PH
Writing position
At the writing position, photoconductor drum rotation speed changes and shifting occurs.
- 30 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Drum speed > 0 : Drum speed < 0 :
Transferred as white white line Transferred as black black line
The noise width changes according to the frequency but relatively, sharp line appears. (3 (3)) Solutio n 1. Change screen a and nd check whether the symptom is improved. Using actual customer image, image, try Dot130, Dot150 or Dot175 and see the effect. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment]→[Custom Screen]
Note Please get approval from the customer to change change screen. go to the next step.
If customer does not accept to change,
2. Set [Thick BK Mode] setting from "OFF" (Default) to "ON". [Paper Setting]→[Change Set]→[Expert Adj.]→[Thick BK Mode] Even if printing single black color, YMC 1st transfer rollers are in pressed state and intermediate transfer belt tension is kept high to prevent the belt gets loosen when the thick paper enters to the nipping part of the 2nd transfer unit.
Note • When the Expert Adj. is not indicated, change cha nge the DIPSW1-0 (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). • When performing this setting, even the image is single black, yellow, magenta and cyan related parts (charging corona, drum unit, developing unit and 1 st transfer roller) is consumed. Therefore, be sure to turn OFF [Thick Paper BK Mode] when it is not necessary or register the setting to the paper profile for the specific paper so that it works only for the specified case.
- 31 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3. If step 2 does not improve enough, adjust the belt line speed. [Service]→[Machine Adjustment]→[Printer Adjustment]→[Belt Line Speed Adj.] Note • When the belt line speed is not adjusted properly properly,, the speed difference among fusing, intermediate transfer, 2nd transfer and registration units. This causes line. 4. If the step 3 does not improve, check whether the fusing loop actuator on the fusing front guide part moves smoothly smoothly..
If iitt does not, replace it. it.
p/n : A1RF7503 + A1RF7504 Note ON/OFF of the actuator controls fusing motor speed.
It controls the loop amount between 2nd
transfer andif fusing unit. does not move smoothly, loop control fails and the speed difference Therefore, the actuator among fusing, intermediate transfer 2nd transfer and registration occurs and line appears. Table of contents contents
- 32 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3. 3.6. 6. CD glos s lin e due to wid th of o f bl ank space space 1. (1) Symptom The gloss line in cross direction occurs due to width of blank space.
Paper Blank space at 1 st page
Same as width of blank space
Blank space at 2 nd page
Same as width of blank space
377mm
377mm
(2) Cause 377mm Due to the effect of the wax component which was transferred to the fusing upper belt, the difference of the gloss gloss corresponding to the image image appears at fusing upper b belt elt cycle (approx. 377mm). (This ") memory") is one kind of "1.5.10 "1.5.10 Gloss memory (3) Solution 1. Change fusing temperature. For the coated paper, decrease decrease the temperature by every 5ºC 5ºC (Maximum: -10 ºC) and check the effect. For the uncoated paper, increase temperature by every 5ºC and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] • [Fus. T-Belt Center Temp (Print)] • [Fus. T-Belt Edge Temp (Print)]
Note • When the Expert Adj. is no nott indicated, change the DIPSW1-0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). 2. If the step 1 does not improve enough, change the temperature by 5 ºC within the range from -10 ºC to +20 ºC to seek the temperature symptom is the least visible. Note • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. • When the temperature is increased too much, large paper curl may occur depending on the paper type and ambient environment. In this case, increase temperature of [L-Fus. PressRoller Center(Print)] or use the curl correction of RU. [Paper Adj.]→[L-Fus. PressRoller Center(Print)] [Paper Setting]→[Change Setting]→[Change Set]→[Expert Set]→[Curl Adjustment]
- 33 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Tips • Low temperature Regardless of the previous image, the gloss level is entirely low and the difference is not easily see. • High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen. • Middle temperature Depending on the wax amount difference d ifference on the belt, the gloss memory is easily find. Table of contents contents
- 34 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.3. 3.7. 7. Banding in developi ng r oller c ycle (44mm, (44mm, uneven uneven densi ty) ty) 1. (1) Symptom
Banding (density difference) appears to the cross direction in 44mm cycle.
Feed Direction Approx. 44mm
(2) Cause
• Due to the developing roller’s rotation fluctuation Ds (Distance between developing roller and and surface of the drum) and Db (amount of developer conveyance on the developing roller) changes cyclically.. This affects to the developing ability and resulting in the banding on the image. cyclically • When the developing ability is low (Ds is wide and the conveyance amount is small small,, the developing electric filed is weak) also aggravates the t he symptom. (3) Solution
1 Enhance ability 1) While W hiledeveloping checking the halftone image, change the adjustment value of the [Develop AC Bias Fine Adj.] to larger. Service Mode → [Process Adjustment] → [Process Fine Adjustment] → [Develop AC Bias Fine Adj.] 2) After finishing the adjustment, perform Gamma Automatic Automatic Adjustment Service Mode →[Process Adjustment]→[Drum Peculiarity Adj]→ [Gamma Automatic Adjustment] If the improvement is not enough, go to 2. 2 Correction by the image processing 1) Change the DIPSW 67-1 to 1 as the adjustment function is disabled. (The button is grayed out as the default.) Service mode→[System Setting]→[Software DIPSW Setting] 2) Access to the [Deve. Unit Cyclic C yclic Adjustment] and press [Start]. Service Mode→[Process Adjustment]→ [Drum Peculiarity Adjustment] → [Deve. Unit Cyclic Adjustment]
Fig .1 Deve. Unit Cyclic Adjustment Screen
- 35 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3) After the adjustment comp completes, letes, go to the Print Mode and print the test pattern. (YMCK halftone chart) and check each sheet. (4 sheets) *1 4) If the correction is too much or not enough, back to the Deve. Unit Cyclic Adjustment Screen and change the setting from manual adjustment. Print the charts again and check the image *1. Press [Manual Adj.], change the setting of the respective color then press [Return] →[Print Mode] Adjustment range (Correction weaker)-5 to +5 (Correction stronger) Note: For the color correction is not needed, change [Correction OFF].
Fig.2 Manual Adj. correction fine adjustment screen Table of contents contents
- 36 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.4. 4.1. 1. Toner c ontamin ontamination(spil ation(spil ling )/ )/T Toner s cattering insi de machine machine 1. (1) Symptom • When the low coverage image is printed continuously (5%, over 10,000 pages), toner inside the developing unit deteriorates deteriorate s and background/Toner scattering may occur.
• When high coverage image is printed continuously (rough indication: 25% or higher, 25,000 pages), the toner scatters inside the machine and it may soil the image. When the previous job image is low coverage, (rough indication: 5% or less), toner scattering gets worse and image soilage is more likely to occur. Toner contamination (spilling)
Toner scattering inside machine
- 37 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (2) Cause • While printing high coverage image, much amount of toner is is supplied to the developing unit. As the result, the toner w which hich stays in the developing unit short time increases. As the result, it is is agitated only for short period and not charged much. This increase the amount of toner to be scattered. Especially, Especially, the toner deteriorated by the low cov coverage erage print does not mix with the the supplied toner. toner. Therefore, the low charged toner increases more and the scattering amount increases. • Scattered toner accumulates on the cover of developing d eveloping unit [1] and the edges of developing sleeve roller [2]. The vibration or air flow drop it on the image area.
[2]
[1]
(3) Solution To prevent the image soilage by b y the spilled toner, clean the following position at service ser vice visit. *Be sure to clean the following parts with every 350,000 interval as mentioned in the service manual. ・ Clean inside the process unit at [1],[2] and upper cover of the developing unit [1] with the the vacuum
cleaner or with the Hydro wipe and drum cleaner.
・
Clean the drum potential sensor stays/Y/M/C/K [1] and [2] with a blower brush. br ush.
- 38 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Note ・ Be sure to use such as vacuum
the blower brush. If the others cleaner and hydro wipe
are used, the damaged by the
drum potential sensor may get static electricity. electricity.
Reference: The state of developing upper cover after 350,000 prints.
Table of contents contents
- 39 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.4. 4.2. 2. Backgr Background ound w hile printing prin ting high h igh coverage co verage 1. (1) Symptom When the machine is not operated for several hours (overnight) then high coverage job is continuously printed (e.g.: 25% and over and 2,000 pages) after continuous print of low coverage job (e.g.: 5% and a nd 1,000 pages), the toner scatters inside the machine and image background may occur. (2) Cause During high coverage print, the toner supply amount to the developing unit increases. Then low charged toner which is agitated only for short period increases inside the developing unit and the scattering toner increases. Especially, Especially, when the developer deteriorates by the low coverage print, it does not mix with the supplied toner. toner. This additionally increase low charged toner and resulting in more toner toner to scatter. scatter. Toner charge decreases w when hen the developer is not agitated for several hours. Therefore, the above condition increase the scattered toner very much and this may cause image background. (3) Solution To reduce background, set the [Process Fine Adjustment] to +5 (recommended) and conduct the Automatic Gamma Adjustment. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj.] [Service]→[Process Adjustment]→[Drum Peculiarity Adjustment]→[Gamma Automatic Autom atic Adjustment] Note Setting change may cause carrier attachment or void. Check the image while changing the setting. When the +5 +5 setting is kept, carrier attachment may occur. occur. At next service visit, return the value to 0 then conduct the Gamma Automatic Adjustment.
Table of contents contents
- 40 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.4. 4.3. 3. Intermediate Intermediate transfer tr ansfer belt b elt clea c leaning ning failur failure e 1. (1) Symptom Cleaning failure occurs on intermediate transfer belt cleaning. (2) Possi ble cause 1. Auxiliary cleaner is is assembled in the wrong wrong way Occurrence location: Not specified. Occurrence condition: Screw is is fixed in wrong order at installation of auxiliary cleaner. cleaner. 2. Cleaning blade and intermedia intermediate te transfer belt are not pressed with each other well. Occurrence location: Not specified. Whole area to shaft direction. Occurrence condition: 2 blade blade releasing screws are not removed at the replacement. 3. Clumps are stuck between the blade and the intermediate transfer belt Lubricant piles up at the edge of cleaning blade, and form clumps with paper dust. Cleaning failure occurs when the clumps go into between the cleaning blade and the transfer belt. Occurrence location: Not specified. Occurrence condition: Printing uncoated paper which h has as paper dust with low coverage. 4. Attachment of the additive When the additive attaches on the belt, cleaning failure may occur.
(3) Solution
1.
Replace auxiliary cleaner Assy At auxiliary cleaner assy [3] installation, be sure to install the screw [1] after you install the screw [2] When you install the screw [1] first, the auxiliary cleaner assy [3] may get distorted and does not operate normally normally..
Auxiliary cleaner cleaner assy [3]
screw [2]
screw [1]
2.
Be sure to remove 2 blade release screws [1].
screw [1]
screw [1]
- 41 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.
Change the DIPSW DIPSW setting for frequen frequency cy of reverse rotation to clean clumps. Execute reverse rotation every 250 prints. The higher the frequency of the reverse rotation, the less the occurrence of cleaning failure. Note Changing the frequency of reverse rotation affect the productivity. DIPSW 103-0 0
103-1 0
1
0
0
1
1
1
Execute interval 2000 pages (A4) (600m) 1000 pages (A4) (270m) 500 pages (A4) (135m) 250 pages (A4) (67.5m)
PPH (Pages Per Hour) Default Decreasing about 1.5% against default Decreasing about 4% against default Decreasing about 8% against default. (Recommended)
Table of contents contents
- 42 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5.1 .1.. Roug Rough h im age on thi n coated co ated paper 1.5 (1) Symptom Many air bubbles appear on the toner image and, as a result, the surface becomes rough and the gloss lowers. (a) Occurrence conditions •Thin and coated paper •Large amount of toner attachment •High fusing temperature (2) Cause ･ As the environmental factors such as temperature and humidity changes, the optimum condition for fusing gets changed and the toner attachment volume on the secondary color paper becomes more than what is expected. In that case, it is necessary to re-adjust the 1st transfer condition by A ATVC TVC (Automatic T Transfer ransfer Voltage Control). ･Since air permeability of coated paper (for printing use) is low, if the moisture within toner and paper is heated and evaporated, it is easily stocked in the toner layer. As the fusing temperature is higher and paper attaching toner amount is larger, more moisture evaporated and image worsens its roughness. (3) Solution 1. Conduct Gamma Automatic Adjustment [Service]→[Process Adjustment]→[Drum Peculiarity Adj]→[Gamma Automatic Adjustment]
2. When the step 1 does not improve enough, decrease the fusing temperature by 5 ºC step (Maximum -10 degrees Celsius) and check effect. [Paper Setting]→[Change Set]→[Expert Adj.] ･[Fus. T-Belt Center Temp (Print)] ･[Fus. T-Belt Edge Temp (Print)] ･[L-Fus. PressRoller Center (Print)] Note ･When the Expert Adj. is not indicated, change the DIPSW1-0 (To show expert adjustment in the Paper Setting) from “0” to “1” (Show). • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. 3. When step 2 does not improve, change the [L-Fus. PressRoller Center(Print)] setting from “-10” to “-20”. [Paper Setting]→[Change Set]→[Expert Adj.]→[L-Fus. PressRoller Center(Print)] Table of contents contents
- 43 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5. 5.2. 2. Poor fusin fu sing(T g(Toner oner peeling o ff) occurs occ urs at specifi c paper type 1. (1) Symptom Depends on the paper property, fusing ability is not enough for the specific matt coated paper, thick paper, concavity and convexity paper. .
(2) Cause •Coating layer of coated paper contains too much specific inorganic substance. •When the paper surface is rough (At the concavity and convexity paper, the heat is not applied well to the concave part)
(3) Solution 1. Check if the symptom is iimproved mproved by increasing fusing temperature by 10°C. If it is not improved, gradually, increase the temperature up to 20°C. [Paper Setting]→[Change Set]→[Expert Adj.] ･[Fus. T-Belt Center Temp (Print)] ･[Fus. T-Belt Edge Temp (Print)] Note When the Expert Adj. is not indicated, change the DIPSW1-0 (To show expert adjustment in the Paper Setting) from “0” to "1" (Show). Depending on paper or environment, if the fusing temperature is increased, paper curl may get larger. In this case, increase [L-Fus. PressRoller Center(Print)] or use de-curler of RU. [Paper Setting]→[Change Set]→[Expert Adj.]→[L-fus. PressRoller Center(Print)] 2. When the paper surface is very ver y rough with many convex and concave, toner on convex part melts too much and and that may soil the paper. paper. In that case, do not change the fusing upper belt temperature but change [L-Fus. PressRoller Center(Print)] to “+10”. If the symptom is not improved, increase the temperature gradually gradua lly by 20°C in the maximum. [Paper Setting]→[Change Set]→[Expert Adj.] ･[L-Fus. PressRoller Center(Print)]
Note • Register the settings to the paper profile so that it works only for the specific paper. • The preset setting function may be helpful to increase fusing temperature. 1. Select the higher glossiness / fusing setting in preset data [Paper Setting]→[Preset] Select [Higher] in glossiness / fusing setting, and press [OK]. The fusing temperature increase by 10°C from default with [Higher] in glossiness / fusing setting. 2. Check the effect. If there is improvement, register the settings to the paper profile so that it works only for the specific paper. • In case that this adjustment steps are frequently required by a customer, instruct the customer how to use preset function.
- 44 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
contents Table of contents
- 45 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5.3. Darker image at trailing edge/lighter at leading edge (1) Symptom The density of the image at the trailing edge of a patch patch gets darker darker.. edge of a patch gets lighter.
Also, the density at the leading
Example: Halftone image
Feed Direction
On the actual sample, the darker dark er image at the trailing edge is more noticeable.
(2) Cause Toner image on drum are swept to the trailing edge by magnetic brush of developer because developing sleeve roller rotation direction and drum rotation direction is opposite. It is difficult to repair the toner image under the normal developing bias setting.
Darker trailing edge Width of developing Latent image
DU
Contact width Fainted leading edge Toner movement
Developing roller
- 46 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution
1. Conduct the edge density adjustment by DIPSW and setting screen. 1. To To show the [Edge Density Adjustment], change DIPSW91-4 fr from om "0" to "1". Service mode→[System Setting]→[Software DIPSW] DIPSW91-4 Details 0 Hide the Edge Density Adjustment (Default) 1 Show the Edge Density Adjustment button (Recommended). Note: Setting DIPSW is not enough to enable the function.
Refer to below for details.
Edge Density Adjustment: Front End Edge: ON or OFF (OFF is the default) d efault) Rear End Edge: ON or OFF (OFF is the default) d efault) After setting ON, Adjustment range: Leading edge (Front End Edge) +1 to +9 (Default +5) Trailing edge (Rear End Edge) -1 to -9 (Default -5) Target Object : Text/Graphics ext/Gr aphics or Text/Graphics ext/Gr aphics/Image /Image Fig. 1: Edge Density Adjustment in service mode
2. Set ON for the Edge Density Adjustment from Service mode or Administrator Setting. Press Edge Density Adjustment then change Front End Edge and Rear End Edge to "ON". ・CE adjustment [Service]-[Process Adjustment]-[Process Fine Adjustment]-[Edge Density Densit y Adjustment] ･User/Administrator [Administrator Setting]-[System Setting]-[Expert Adjustment]-[Process Adjustment] -[Edge Density Adjustment]
- 47 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Fig. 3. Edge Density Adjustment screen (After pressing ON ）
3. If the improvement is not enough, change the correction value for all colors. When the leading edge is lighter, adjust to the + direction (Default is +5). When the trailing trailing edge is darker, set the – direction. direction. (Default is -5). Adjustment is available for each color independently independently..
2. Change granularity setting to +1 or +2. (Recommendation: +2). The granularity level and darker edge improvement level is selectable by the combination of the
- 48 -
KONICA MINOLTA MINOLTA Confidenti Confidential al DipSW or button in the user screen. Administrator setting: [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Granularity Setting]
Granularity Setting +3 (Normal) +1 +2
Status Initial setting Darker edge reduction Darker edge reduction + Granularity
Darker edge issue 2
Granularity issue 5
4
1
3
4 * Good 5 1 Poor
Note •When the granularity setting is changed to +1, granularity may get worse. Check the effect on the image which the symptom occurs and the side-effect on the chart which the gradation can be checked. In case that this granularity setting is effective depending on image by a customer, instruct the customer how to use this function. •If the granularity setting is set to +1/+2, the function of develop AC bias frequency f requency fine adjustment is disabled.
When the customer is not satisfied with the above improvement, go to next step.
- 49 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Change developing AC bias to +5. When adjustment value is increased, i ncreased, the symptom is improved. •For CE [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine Adj.] •For user/administrator [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→ [Develop AC Bias Fine Adj. Note •When the setting is increased, white spot might occur. If it occurs, decrease setting value 1step and check the effect. •When the setting is increased, image density densit y may get darker. •After changing setting value, conduct gamma automatic adjustment. •For CE [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Gamma Automatic Adjustment] •For user/administrator [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→ [Gamma Automatic Adj.] When the customer is not satisfied with the above improvement, go to next step. When the customer does not accept deterioration of granularity with the above setting, set granularity priority setting to “ON” and go to next step. 4. Change screen and check whether the symptom is improved. Print customer image by Dot130, Dot150 and Dot175 screens and check the effect. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment]→[Custom Screen] Note Before changing the screen, ask the customer if they agree for the change. A customer may not accept.
When the customer does not accept the screen change, go to step 5.
5. Change toner density. density. Decrease the setting. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Toner Density Fine Adj.] Note After changing the toner density fine adjustment setting, it ttakes akes approx. 100 pages to pr print int until toner density actually decreases on the prints. (50 sheets for duplex, Settings: A4, No.55 test
- 50 -
KONICA MINOLTA MINOLTA Confidenti Confidential al pattern and Coverage 30%)
During printing, the background will be improved gradually. gradually.
Press [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode]. Mod e]. [Test [Test Pattern Pattern]: ]: 55 [Gradation-Y]: 255 [Gradation -M]: 255 [Gradation -C]: 255 [Gradation -K]: 255 [Coverage-Y]: 30 [Coverage -M]: 30 [Coverage -C]: 30 [Coverage -K]: 30 Press [Print Mode] then print on A4.
After finishing the above test print, perform Gamma Automatic Automatic Adjustment. [Service]→[Process Adjustment]→[Drum Peculiarity Adj]→[Gamma Automatic Adjustment] [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Execute Adjust Operation]→[Gamma Operation]→[Gamm a Automatic Adj.] Table of contents contents
- 51 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1. 1.5. 5.4. 4. Une Uneven ven densi ty at halfto halftone ne on thi ck paper (1) Symptom When printing black halftone on thick paper, different density part (uneven transfer) appears at the leading edge of the paper with up-side down triangle shape.
Feed Direction
Feed direction
(2) Cause When the leading edge of paper enters to the nip part of the 2 nd transfer, the intermediate transfer belt speed decreases for a moment. Meanwhile intermediate transfer drive roller continues to feed intermediate transfer belt. belt. This creates looseness of the belt. Consequently, the tiny gap is created between paper and the belt then the discharge occurs. As the paper is conveyed, conveyed, the looseness of the intermediate transfer belt is solved. Therefore, the symptom does does not occur at the trailing edge.
(a) Occurrence conditions ･Thick paper (thickness is high, stiffness independent) ･Black halftone ･Thick paper left in low humid environment (high resistance condition)
[1]
[1] 2nd transfer roller/Up [2] Drive roller [3] 2nd Transfer roller/Lw [4] Belt [5] Paper
[2]
[3]
4 5
- 52 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution 1. Change setting of [Thick Bk Mode] from “OFF”(Default) to “ON”. [Paper Setting]→[Change Set]→[Expert Adj.]→[Thick Bk Mode] The YMC 1st transfer roller is pressed state for the Bk printing to keep the tension of intermediate transfer belt. It improves looseness of the intermediate transfer belt when the thick paper enters to the 2nd transfer nip.
Note: •When the Expert Adj. is not indicated, change the DIPSW1-0 (T (To o show expert adjustment in the Paper Setting) from "0" to "1" (Show). •When the setting is changed to ON, even the image color is black, the yellow, magenta, and cyan color parts (charging corona, drum unit, developing unit, developer and 1 st transfer roller) consumes. Therefore, turn ON [Thick Bk Bk Mode] only when needed or resister it to the paper profile so that it works only for the specific paper.
2. If the step 1 is not enough, conduct [2nd [ 2nd Transfer Output Adjustment] Adjustment] and enter the plus value by 10 increments. ･[Paper Setting]→[Change Set]→[Expert Set]→[Exp ert Adj.]→[2nd Transfer Output Adj. (Front)] ･[Paper Setting]→[Change Set]→[Expert Set]→[Exp ert Adj.]→[2nd Transfer Output Adj. (Back)]]
- 53 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3. Adjust the speed for the transfer from the [Transfer Torque Torque Adjustment]. [Adjustment]→[Machine Adjustment]→[Printer Adjustment]→[Transfer Torque Adjustment] Increase by every +1 step and check the image. (Maximum adjustment range: +4) ・To show the Transfer Torque Adjustment button, change the DIPSW73-5 (Transfer T Torque orque Adjustment) from “0”(default) to “1”. “ 1”. [Service mode]→[System Setting]→[Software DIPSW Setting] DIPSW73-5 Details 0 Hide the Transfer Torque Adjustment button (Default) 1 Show the Transfer Torque Adjustment button (recommended)
contents Table of contents
- 54 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5 1.5.5 .5.. Fine Fine line li ne blur s at the th e leadin leading g edge (1) Symptom At the leading edge of paper, the fine line in CD (main scan direction) gets blurred to trail direction. FD
Feed Direction
(2) Cause Toner charge amount decreases and the toner binding effect to the paper decreases. Consequently, when the paper enters the fusing nip, the fine line at the leading edge of paper gets blurred.
(a) Occurrence conditions •The first in the morning under high temperature and high humidity environment. •Coated paper
Blur occurring location
(3) Solution 1. At [T [Toner oner Density Fine Adjustment], decrease toner density of the blurred color. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[T Adjustm ent]→[Toner oner Density Fine Fi ne Adjustment] Note After changing the toner density fine adjustment setting, it takes approx. 100 pages to print until toner density actually decreases on the prints. (50 sheets for duplex, Settings: A4, SGU55 and Coverage 30%) 30%) During printing, the background will be be improved improved gradually gradually.. Press [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode]. [T [Test est Pattern]: 55 [Gradation-Y]: 255 [Gradation -M]: 255 [Gradation -C]: 255 [Gradation -K]: 255 [Coverage-Y]: 30 [Coverage -M]: 30 [Coverage -C]: 30 [Coverage -K]: 30 Press [Print Mode] then print on A4. After finishing the above test print, perform Gamma Automatic Automatic Adjustment. Adjustment. [Service]→[Process Adjustment]→[Drum Peculiarity Adj]→[Gamma Automatic Adjustment] [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Execute Adjust Operation]→[Gamma Automatic Adj.]
Table of contents contents
- 55 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1. 1.5. 5.6. 6. Aslant banding (de (densi nsi ty dif ference) (1) Symptom ･Transfer caused banding On the entirely solid image, aslant banding occurs as shown in the figure below. It tends to occur when printing the solid black on coated paper after leaving machine under high temperature and high humidity environment for long time.
･Developing caused banding
On the entire halftone image, aslant banding occurs as shown in the figure below. below. Much finer line than the above occurs. The angle of aslant is not constant and many banding appears. It tends to occur when all the following conditions are satisfied; developer life is near end, high temperature and high humidity environment, after leaving machine untouched for long time.
(2) Cause ･Transfer caused banding When the transfer ability is poor due to the low charged toner, slight waving of the 2nd transfer belt causes abnormal discharge at the 2 nd transfer nipping part. Due to the discharge, the toner is not transferred at the responding part, causing banding. Specifically,, the Bk Specifically Bk toner transfer ability is different from other color in HH environment. It easily gets affected by the waving and soilage of the belt and aslant banding appears.
Developing caused banding ･ When the toner is low charged and fluidity of developer is decreased, the amount of developer conveyed to the developing roller iis s not stable.
Consequently Consequently,, banding occurs.
- 56 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution 1. Change the setting for the 2nd transfer output every 10 steps and check the image to see the effect. The change to + direction is effective. [Paper Setting]→[Change Set]→[Expert Adj.] • 2nd Transfer Output Adj. (Front) • 2nd Transfer Output Adj. (Back) Note: • When the value is changed drastically to + direction, density decrease occurs due to insufficient transfer. If adjusting using solid Bk, before completes adjustment, check the image also in secondary color and adjust as needed. 2. Measure toner charge using toner Charge Quantity Detection. [Service]→[Process Adjustment]→[Sensor Output Confirm]→[T Confirm ]→[Toner oner Charge Quantity Detect]
3. When the toner Charge indication is 250 or less, change the respective toner density to -3, [Service]→[Process Adjustment]→[Process Fine Adjustment.]→[T Adjustm ent.]→[Toner oner Density F Fine ine Adj.] Note • After replacing to new developer, return the toner density fine adjustment setting to "0". • After changing the toner density fine adjustment setting, it takes approx. 100 pages to print until toner density actually decreases on the prints. (50 sheets for duplex, Settings: A4, Test Pattern No. 55 and Coverage 30%) 30%) During printing, the background will be improved gradually. gradually. ess [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode]. Pr ess [Test [Test Pattern] Pattern]:: 55 [Gradation-Y]: 255
[Gradation-M]: 255 [Gradation-C]: 255 [Gradation-K]: 255 [Coverage-Y]: 30 [Coverage-M]: 30 [Coverage-C]: 30 [Coverage-K]: 30 Press [Print Mode] then print on A4. After finishing the above test print, perform Gamma Automatic Automatic Adjustment. Adjustment. [Service]→[Process Adjustment]→[Drum Peculiarity Adj]→[Gamma Automatic Adjustment] [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Execute Adjust Operation]→[Gamma Automatic Adj.]
contents Table of contents
- 57 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5 1.5.7 .7.. Wax Wax attachm ent/Pape ent/Paperr dus d ustt attachment att achment (1) Symptom After printing high coverage continuously then leaving machi machine ne unused for hours, when the the machine is used again, foreign material may be attached to the 1 st print as the accumulated wax may falling on the image. Occurred at the area equivalent to 1 turn of fusing exit roller (approx. 50mm)
････････････ ････････････ ･･･ ･･･････
Whitish foreign material => (wax)
· When the customer uses the paper containing much paper dust, the dust piled at the registration section or fusing exit roller is ejected together with the paper.
Paper dust
(2) Cause While continuous printing of high coverage image, wax may accumulate on fusing paper exit roller. (3) Solution 1. Request the customer to print 1 sheet under following setting for cleaning. Desirable paper: Paper weight 120 to 150gsm, coated paper (ex. POD gloss coat 128gsm) Paper feed mode: Duplex, 1 sheet (type of print image is not specified)
2. When the step 1 is not accepted, clean the fusing exit roller after printing high coverage. Note: Cleaning without solution is effective additionally, use of drum cleaner (isopropyl alcohol) makes the cleaning easy. easy.
- 58 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. When the symptom does not improve by step 1 or 2, paper dust is the most probable cause. Clean the following positions. ・Registration cleaning sheet assy. assy.
Remove 4 screws and the cover.
Cleaning position Remove registration cleaning sheet assy. and clean the area.
・Cleaning sheet assy assy..
Cleaning position After removing 2 screws, remove the cleaning sheet assy. Clean the area.
- 59 -
KONICA MINOLTA MINOLTA Confidenti Confidential al ・PFU vertical conveyance section
Cleaning position Surface of the guide
・
PFU horizontal conveyance section
Cleaning position Surface of the guide
4. To clean the wax attached to the paper exit roller, roller, use the paper exit roller cleaning mode.
When the specific conditions are satisfied, a blank sheet is fed before starting a job to clean the wax attached to the paper exit roller. DIPSW 66-4 Paper exit roller cleaning ON/OFF: 0: Do not conduct cleaning 1: Conduct cleaning DIPSW 66-5 Paper exit roller cleaning threshold (time): 0: Over 20 min. 1: Over 60 min. DIPSW 66-6 Paper exit roller cleaning threshold (interval count):
0: Over 1,500 counts 1: Over 50,000 counts 5.
If the symptom is not improved, replace both of following parts to countermeasure applied type. It is available as after parts for individual countermeasure. Parts name Fusing paper exit roller/Up Drive ball bearing /6r Notes:
Countermeasure type A5AWP002
Normal Type
Remark
A5AW7602
A5AWP002 life: 550kp A5AW7602 life: 2,100kp
A4EU2520
A00J2112
・For the fusing paper exit roller/Up, the parts life is shorter for the countermeasure type. ・It can be also used for C1100/C1085 series.
Table of contents contents
- 60 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5. 5.8. 8. Highligh t gradation g radation c hanges daily 1. (1) Symptom Gradation at highlight changes daily. daily.
(Changes after conducting gamma gamma automatic automatic adjustment) adjustment)
Gradation at highlight for each color changes
(2) Cause The foreign material attaching to the intermediate drive roller adds ad ds noise to the output of IDC sensor detection then gamma correction accuracy lowered. (3) Solution 1. Clean the intermediate transfer drive roller (A5AW5005). (Refer to service manual for how to clean)
2. Conduct Gamma automatic adjustment [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Gamma Automatic Adj.] 3. Conduct printer gamma offset adjustment ・ [Service]→[Machine Adjustment]→[Quality Adjustment]→[Printer Gamma Adjustment]→[Printer Gamma Offset Adj.] ・ [Service]→[Machine Adjustment]→[Quality Adjustment]→[Printer Gamma Adjustment]→[Printer Gamma Offset Auto] ・ [Service]→[Machine Adjustment]→[Quality Adjustment]→[01 Printer Gamma Adjustment]]→[05 Printer Gamma Offset Auto (RU)] 4. If the improvement is not enough until step.3, replace the intermediate transfer drive roller (A5AW5005) and the intermediate transfer belt (A1RF5060) Table of contents contents
- 61 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5. 5.9. 9. Color change ch ange at at con tin tinuous uous pri nt 1. (1) Symptom During continuous printing, color changes. (2) Solution At [Stabilization Adj. Setting], increase the correction frequency to perform correction frequently. Setting can be changed according to the pages per job. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment]→[Stabilization Adj. Setting] Correction Interval of Middle Image Stabilization Control Control Contents None -2 -1 0 +1 +2 Dot Diameter 100 prints 50 prints 30 prints 20 prints 10 prints Correction Checking Interval of 300 prints 150 prints 90 prints 60 prints 30 prints Dmax Correction(*1) *1 Check if Dmax correction is needed. If needed, Dmax correction is performed perfor med automatically. automatically.
Note • When the correction interval during a job is increased (does not stop job), the frequency of the middle correction which stops the job also increases (30 to 40 seconds/time). Therefore, depending on the environment and conditions, the productivity may be decreased. contents Table of contents
- 62 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5.1 .10. 0. Glo Gloss ss memor y 1.5 (1) Symptom The gloss is partly different. different. It corresponds with the image pattern. toner was at the previous cycle).
(Gloss is higher w where here the
(2) Cause Due to the effect of the wax component which was transferred to the fusing upper belt, the difference
of the gloss corresponding to the image appears at fusing upper belt cycle (approx. 377mm). (Gloss memory)
Wax component attaches to the fusing upper belt.
ABCDEFGHIJKL ABCDEFGHIJKL
KL
KL
L K J I H G F E D C B A
L K J I H G F E D C B A
ABCDEFGHIJKL ABCDEFGHIJKL
377mm cycle Repeated gloss mark (text/image)
ABCDEFGHIJ ABCDEFGHIJ ABCDEFGHI J
Gloss mark: Corresponds to the solid history of the belt.
Non gloss mark: Corresponds to the white area
(3) Solution 1. Change fusing temperature. For the coated paper, decrease decrease the temperature by every 5ºC 5ºC (Maximum -10 ºC) and check the effect. effect. For the uncoated paper, increase temperature by every 5ºC and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] • [Fus. T-Belt Center Temp (Print)] • [Fus. T-Belt Edge Temp (Print)]
Note • When the Expert Adj. is no nott indicated, change the DIPSW1-0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). 2. If the step 1 does not improve enough, change the temperature by 5 ºC within the range from -10 ºC to +20 ºC to seek the temperature symptom is the least visible. Note • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53 (1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]: 255
- 63 -
KONICA MINOLTA MINOLTA Confidenti Confidential al [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. • When the temperature is increased too much, large paper curl may occur depending on the paper type and ambient environment. In this case, increase temperature of [L-Fus. PressRoller Center(Print)] or use the curl correction of RU. [Paper Setting]→[Change Set]→[Expert Adj.]→[L-Fus. PressRoller Center(Print)] [Paper Setting]→[Change Set]→[Curl Adjustment]
Tips • Low temperature Regardless of the previous image, the gloss level is entirely low and the difference is not easily see. • High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen. • Middle temperature Depending on the wax amount difference d ifference on the belt, the gloss memory is easily find. 3. If the step 2 does not improve, change the speed to low and check the effect. [Paper Setting]→[Change Set]→[Weigh] ･Speed Setting [High]→[Low] Note • Before starting the step3, return the temperature changed at steps 1 and 2 to original. • Since the lower speed is selected, the productivity decreases. • If the symptom does not improve, take the steps 1 then 2.
Table of contents contents
- 64 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5. 5.1 11 Image Image densit y is ligh ter on unc uncoated oated paper 1. (1) Symptom Image density gets lighter on uncoated paper. surface is rough.
Symptom tends to occur especially when the paper
Fig. Example of lighter density
(2) Cause 1. Melting difference of high gloss toner Toner on the coated paper melts uniformly. On the other hand, toner on uncoated paper tends to melt unevenly because the heat amount is different between toner on the concave position and convex position.
Thefibers toner of onthe thepaper convex position melts more is easily absorbed the paper. This of causes the gets exposed and light and scatters. Because of into the angular variation variation the scattering light, image looks lighter or spotty spotty.. C1 C1100 100 uses high gloss toner and the symptom more likely to occur. After melting
Before melting Coated paper High gloss toner (C1100) Coated
Melting toner is not absorbed to paper's fiber and white background does not remain. Light makes regular reflection on toner's surface and changes its angle on paper's rough surface, which appears as unevenness.
Uncoated paper High gloss toner (C1100)
Uncoated Melting toner is absorbed to paper's fiber and white background remains. This is a small scattering reflection and appears even as a whole.
Uncoated paper Low gloss toner (C6501) Uncoated Non-melting toner is not absorbed to paper's fiber and some are crushed leaving its shape.
2. Transfer ability iis s poor The transfer ability of paper is not even in a page due to the roughness of the paper surface and difference of the resistance. Moreover the transfer ability get worse when the toner is deteriorated, so it is susceptible to roughness of paper surface.
- 65 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution
For CE 1. Conduct toner refresh mode and check the effect. [Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode] Press OK then exit adjustment. After the screen message changes from "Now Adjusting" Adjusting" to ”Ready to Print”, print image and check the effect. 2. Change 2nd transfer output setting every 10 steps and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] • 2nd Transfer Output Adj. (Front) • 2nd Transfer Output Adj. (Back) Note • The transfer ability changes according to the transfer current output (parabola shape. chart below). below). Therefore, please check both + side and /- side. • Register the settings to the paper profile so that it works only for the specific paper.
y t i l i b a r e f s n
Optimum Range
a r T
Transfer output Fig. Relation between transfer ability and transfer output
- 66 -
See the
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Conduct each paper type color adjustment on the paper which this symptom occurs. 3-1. Preparation 1) Measurement instrument (i1iSisXL, i1-Pro/i1-Pro2, or FD-5BT) 2) ProfileMaker Measure Tool: for i1iSisXL or i1-Pro/i1-Pro2, Measure Tool Color Care measure: for FD-5BT 3) USB memory Create following folder in advance. ¥C6100¥ADJUST_DATA 3-2. Adjustment chart printing 1) Select each paper type color adjustment. [Adjustment]→[Quality Adjustment]→[Color Density Control]→[Each Paper P aper Type Color Adj.] 2) Select any row from each paper type color adjustment list. 3) Press the [Print Mode], and enter a name for the each paper type color adjustment. 4) Select the screen type [Quality Adj.]→[Screen Pattern] 5) After selecting the tray to output the charts, press [Start] key of operation panel. -– Chart will be printed out -*When setting the paper exit tray tra y, specify from [Output Setting]. Type of chart Middle (210.0-270.9mm)
Paper size
FD Length (mm)
A3
420
A4
210
A4S
297
✓
B4
364
✓
B5
182
B5S
257
SRA3
450
SRA4
225
SRA4S
320
13x19
483
✓ ✓
12x18
457
✓
11x17
432
✓
8.5x14
216
✓
8.5x11
216
✓
8.5x11S
279
✓
8.5x14S
356
✓
8K 16K
390 270
Small (176-209.9mm)
Large (271.0mm-)
✓ ✓
✓ ✓ ✓ ✓
✓
✓
3-3. Measure chart(s) and register colorimetric data 3-3-1. via USB Flash Drive 1) Read charts by using spectrophotometer and then create colorimetric data. 2) Save the colorimetric data in the path [¥C1100¥ADJUST_DA [¥C1100¥ADJUST_DATA TA]] of USB flash drive. 3) Connect the USB flash drive, in which the colorimetric measurement data is stored, to the USB port of the machine. 4) Register the colorimetric data. [Adjustment]→[Color Density Control]→[Each Paper Type Color Adj.] 5) Select the register name w which hich the chart was printed from the Each Paper Paper Type Type Color Color Sensor Adjustment List. 6) Press tthe he [USB Memory] on the each paper type color sensor adjustment screen 7) Select one file. 8) Press [OK] on the [Color Data File Select] screen
3-3-2. via Web
- 67 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 1) 2)
3) 4) 5) 6) 7) 8) 9) 10) 11)
Read charts by using spectrophotometer and then create colorimetric data. Access tto o Web Uti Utilities lities from the computer connected to the machine via the network. For IC-604: http: //a.b.c.d: 30091/ 30091/ //a.b.c.d For IC-313 : http: //a.b.c.d (Enter the IP address of the machine into a.b.c.d) Click [Machine Manager Setting], and enter enter the administrator ID and password. Click on [Color Measuring data Input]. Enter the file name for colorimetric data into [File [File Name], and select the colorimetric data saved in the PC. Click [Upload]. Register the colorimetric data. Pa per Type Color Adj.] [Adjustment]→[Color Density Control]→[Each Paper Select the register name w which hich the chart was printed from the Each Paper Paper Type Type Color Color Sensor Adjustment List. Press the [Engine Archived Data] on the each paper type color sensor adjustment screen Select one file. Press [OK] on the [Color Data F File ile Select] screen
3-4. Recall the registered data. [Paper Setting]→[Change Set]→[Color Density] Select [Registered Adj. Data] from [Each Paper Type Color Adj. Data], and select the registered colorimetric data. Note • Register the settings to the paper profile so that it work works s only for the specific paper. 4. With the process adjustment, increase ttoner oner attachment amount of both YM YMC C and K by every 1 step, and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] • [Dens. Adj. Per Tray (YMC)] ( YMC)] • [Dens. Adj. Per Tray (K)] Note • Side effect of toner attachment amount increase 1) Characters become oversaturated. White cha characters racters edge becomes unclear. 2) Color balance gets unbalanced, becoming entirely darkish. 3) Toner consumption increases. • When the Expert Adj. is is not indicated, change the DIPSW1-0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). • Register the settings to the paper profile so that it works only for the specific paper.
- 68 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 5. Decrease the temperature by every 5ºC (Maximum -10 ºC) and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] • [Fus. T-Belt Center Temp (Print)] • [Fus. T-Belt Edge Temp (Print)] Note • When the Expert Adj. is not indicated, change the DIPS DIPSW1-0 W1-0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53 (10 sheets) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. • Default fusing temperature is different according to the paper type selected by the paper setting. The temperature for the plain paper is higher than that for fine/color specific. Therefore, when changing the fusing temperature, mind the paper type selected. • Register the settings to the paper profile so that it works only for the specific paper. 6. Decrease the line speed then decrease the fusing temperature further down Change the [Shorten Tray Change Time (Mixed Weight Job)] from [standard] to [shorter] [Paper Setting]→[Change Set]→[Weight]. At the speed setting, select [Low]. Decrease the temperature by every ever y 5 degrees Celsius (Maximum -20 ºC) and check che ck the effect. • [Fus. T-Belt Center Temp (Print)] • [Fus. T-Belt Edge Temp (Print)] Note • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Please check if “fusing under offset” symptom occurs as mentioned in (3) Solution 5. • Productivity is lowered by decreasing the line speed • If the symptom is not improved by decreasing fusing temperature and speed setting, return the both settings to the default. • Register the settings to the th e paper profile so that it works only for the specific paper.
- 69 -
KONICA MINOLTA MINOLTA Confidenti Confidential al For user / administrator Use the preset setting function for unsmooth paper density setting and check the effect. [Paper Setting]→[Preset] Select [Evenness+1] in [Unsmooth Paper Density Setting] and press [OK]. Check effect. If the effect is enough, register the settings to the paper profile. If the effect is not enough, increase the evenness level every 1step and check the effect. Note • When the Expert Adj. is not indicated, change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show). • Correspondences of preset settings sett ings and expert adjustment settings are below. Evenness+1: Fusing temperature -7ºC Evenness+2: Dens. Adj. Per Tray (YMC) +1 Dens. Adj. Per Tray (K) +1 Evenness+3: Dens. Adj. Per Tray (YMC) +2 Dens. Adj. Per Tray (K) +2 Evenness+4: Dens. Adj. Per Tray (YMC) +3 Dens. Adj. Per Tray (K) +3 • When [Evenness+1] is selected, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) might occur. Please check if “fusing under offset” symptom occurs with printing 10 sheets of samples, before starting job. • When [Evenness+2~+4] is selected, the side effect by increased toner attachment amount might occur. 1) Characters become oversaturated. White characters edge becomes unclear. unclear. 2) Color balance gets unbalanced, becoming entirely darkish. 3) Toner consumption increases. • Register the settings to the paper profile so that it works only for the specific paper. • In case that this preset setting can be changed by a customer, train the procedure to use preset setting function to an operator.
- 70 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
- 71 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (4) Procedure
For CE Start
Conduct toner refresh mode
Improved
Check Effect
More improvement needed Change 2nd Transfer Output
Improved
Check effect
More improvement needed Conduct each paper type color adjustment
Improved
Check effect
More improvement needed Change toner attachment amount
Check effect
Improved
More improvement needed Change of fusing temperature
Check effect
Improved
More improvement needed Change of process speed and fusing temperature
End Table of contents contents
- 72 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5 1.5.1 .12. 2. Thin l in ine e is fainted fain ted (1) Symptom Thin line is fainted.
The thi thin n line line reproduction is poor.
0.5pt (8-pixel line)
0.25pt (4-pixel line) 0.1pt (2-pixel line)
0.01pt (1-pixel line)
0.1pt 0.25pt (2-pixel (4-pixel line) line)
0.5pt (8-pixel line)
Thin line (e.g. 0.1pt or less) gets fainted or reproduction is poor.
(2) Cause • RIP type is set as CPSI. • The dark edge and the lead edge fainting performance are decreased. (3) Solution
1. ･Change RIP type JobCentro Open a dialogue of Print Setting after selecting an objective job from Hold Job List of JobCentro. Then, select "APPE" on Imaging Imaging ta tab. b. (Refer to Fig.2) [Job edit]→[Imaging]→[PDF RIP] Note Only PDF format is supported.
Fig.1 JobCentro Print Setting
- 73 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 2. Apply Thin line enhancement processing • Printing from printer driver Open printer property from the print dialogue of each application, check "1 dot line emphasis" (Refer to Fig.3) [Imaging]→[1 Dot Line Emphasis] • JobCentro Open a dialogue of Print Setting after selecting an objective job from Hold Job List of JobCentro. Then, select "1 Dot Line Emphasis" on Imaging tab. (Refer to Fig.5) [Job edit]→[Imaging]→[1 Dot Line Emphasis]
Fig.2 Printer Driver
Fig.3 JobCentro Note: The processing is not applied to the text and the bitmap files. 3. Change Develop AC AC Bias Fine adjustment setting. Decrease the value to improve the symptom. →[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine [Service mode] Adj]. Note • When setting value is decreased, the background or image roughness may get worsen. •A After fter changing the adjustment value, conduct gamma automatic adjustment. [Service mode]→[Process Adjustment]→[Drum Peculiarity Adj]→[Gamma Automatic Adjustment]
- 74 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 4. Change Speed setting from [High] to [Middle] [Paper Setting]→[Change Set]→[Weight], then at speed setting, select →[Middle] The effect is larger when the [Low] is selected. Note • When the Process Adj. is not indicated, change the DIPSW1-0 (To (To show process adjustment in the Paper Setting) from "0" to "1" (Show). • By this setting, the productivity decreases when the set tray is used. Line speed Accurio Press C6100 Accurio Press C6085
Standard 460mm/s 400mm/s
[Speed Setting] Setting Short 400mm/s -
contents Table of contents
- 75 -
Shorter 230mm/s 230mm/s
KONICA MINOLTA MINOLTA Confidenti Confidential al
1. 1.5. 5.13 13.. Image Image off centered c entered in Cross Cros s Direction (ma (main in scan dir ection) (1) Symptom ・Image off centering in CD (main scan direction) occurs. ・ The value of automatic centering adjustment turns abnormal. between +/-200)
Off-centered image
(Normal value is is in the range
Abnormal value for the automatic centering adjustment
(2) Cause ・ Failed to level the main body and the PFU. ・ Failed connection between the off-centering sensor (deflection sensor) and th the e PFU drive board. ・ Failed off-centering sensor. (PFU side/ADU side) ・ Failed PFU PFU drive board (3) Solution 1. Check whether whether the main body height and PF PFU U height is levelled properly. properly. (For how to level the main body and PFU, refer to the Service Manual.) 2. Check the connection between off-centering sensor (deflection sensor) to PFU drive board.
3. Replace off-centering sensor (deflection sensor). PFU: Deflection Sensor Assy: A5AWR735** ADU: ADU Deflection Sensor Assy: A5AWR736** A5AWR736** 4. Replace PFU drive board. PFU drive board: A55CH01015 contents Table of contents
- 76 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5.14. Uneven gloss on thick paper (1) Symptom In a page, high gloss area and low gloss area is mixed and it looks as the uneven gloss. (Higher gloss gloss part mostly appears at the the image edges edges (machine front to rear rear direction). It sometimes occurs like stream from the center to entire page.
(2) Cause There is the temperature range where the gloss level largely changes when the temperature changes a little. If it applies to to the control control temperature temperature for the print, a slight slight temperature temperature difference generates a mixed image of high gloss area and low gloss area. (3) Solution 1.
Change the fusing temperature. For the coated paper, decrease every 5°C and see the result. (Max is is -10°C). For the non-coated paper increase every 5°C and see the result. [Paper Setting]→[Change Set]→[Expert Adj.]→ • [Fus. T-Belt Center T Temp emp (Print)] • [Fus. T-Belt Edge Temp (Print)] (Print )]
Note: When the Expert Adj. is not indicated, change the DIPSW1-0 (T (To o show expert adjustment in the Paper Setting) from "0" to "1" (Show). 2.
If step1 does not improve the symptom, change the temperature by every 5°C up to +/- 20 °C and select the least visible temperature setting.
Note • When the temperature is decreased too much, fusing under offset (toner detaching due to insufficient fusing) may occur. o ccur. Print test pattern No. 53 and check the image to confirm that fusing under offset does not occur. Press [Service Mode]→[Test Mode]→[Test Mode]→[Test Pattern Output Mode]. Mod e]. [Test Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] to print. • Too high temperature may cause larger paper curl depending on the paper type and environment. Increase [L-Fus. PressRoller Center(Print)] or use curl adjustment. [Paper Setting]→[Change Set]→[Expert Adj.]→ [L -Fus. PressRoller Center(Print)] [Paper Setting]→[Curl Adjustment] Table of contents contents
77
KONICA MINOLTA MINOLTA Confidenti Confidential al
1. 1.5. 5.15 15.. Phot Phot ocon duct or memory memory (4) Symptom The image pattern reappears as remaining image (density difference) after approx. 251mm (about one cycle of DU rotation).
通紙方向 Feed Direction
C
C
B
B
A
A
188mm 251 mm
(5) Cause st
･ Too much 1 transfer output
When the toner charge amount decreases mainly in high humidity environment, the transfer output becomes too much. Consequently Consequently,, the image remains on the drum as the latent image.
･ Decrease of drum potential
When the toner charge amount decreases in mainly high humidity environment, the developing ability increases. This determines the lower value for the the drum potential. In this situation, the drum gets the influence easily from the latent image of the one cycle before.
(6) Solution
1. Increase the output for the neutralizing pole of the 1st transfer [Utility/Counter]→[Administrator
Setting]→[System
Setting]→[Expert
Adjustment]→[Process
Adjustment]→[1st Trans. Dis-Elec. Output]
Change the target color setting: "Condition 1" to "Standard" Or "Standard" to "Condition2". After returning to the usual operation screen, the Gamma Ga mma Automatic Adjustment is automatically autom atically started. Note: Line like ripple may occur under the low humidity. 2. Reduce the 1st transfer output ([Front & Back Density]) [Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Front & Back Density] Reduce the 1st transfer output for the subject color by every 5% and check the image. After returning r eturning to the usual operation screen, the Gamma Automatic Adjustment is automatically started. Note: When the value is reduced too much, many white spots may appear. In that case, change the 1st transfer output by every 1% and check the image every time you change the setting.
78
KONICA MINOLTA MINOLTA Confidenti Confidential al
3. Reduce the developing ability [Utility/Counter]→[Administrator Setting]→[System Adjustment]→ [Develop AC Bias Fine Adj.]
Setting]→[Expert
Adjustment]→[Process
Decrease the target color AC developing bias by every 1 step (Max minus 5). After returning return ing to the usual operation screen, the Gamma Automatic Adjustment is automatically started. Note When the developing AC bias setting is set to minus value, the uneven une ven density (in developing cycle may occur.
Table of contents contents
79
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5.16. Uneven density like earthworm (1) Symptom On the halftone image, uneven density in irregular curve appears in the sub-scan direction (FD)
To the sub-scan (FD) direction, there 副走査方向にミミズが這いずったよう are uneven density in the irregular curving lines like earthworm creeping
To the sub-scan (FD) direction, there 副走査方向にミミズが這いずったよう are uneven density in the irregular な濃度ムラが複数本発生する。 curving lines like earthworm creeping
(2) Cause ･The lubricant is not applied to the drum surface evenly evenly..
This causes the drum potential potential decrease.
Then uneven line in earthworm shape occurs. ･Occurrence conditions and frequency 1. Low humidity and Low temperature environment 2. At the first job in the morning or just after the drum refresh for the first time after machine is not operated for hours. When the above conditions are satisfied, symptom occasionally occurs. Occurrence frequency however is low.
80
KONICA MINOLTA MINOLTA Confidenti Confidential al
･ Occurrence mechanism
1. Under the low humidity and low temperature environment, the edge of the lubricant bar gets hardened and fractures. 2. The lubricant application brush rotates together (reverse rotation) at the drum refresh. 3. Then the edge of the lubricant bar is damaged and the broken particle attaches on the photoconductor drum. 4. Even after passing the smoothing blade, the broken particle is not evenly applied. During the drum refresh, the drive for the brush is not powered. However, the brush rotates together with the drum which is in reverse direction.
Drum
Drum Smoothing blade
Lubricant application brush
Lubricant bar
Smoothing blade does not evenly smooth the broken lubricant.
The edge of the lubricant bar gets thinner at the downstream side when the DU count advances. The thin part gets fractured easily.
Smoothing blade
Lubricant application brush
The brush which gets hardened in LL environment rotates in reverse, damages the
Lubricant bar
edge of the lubricant bar then applies the broken particle of the lubricant to the DU.
(3) Solution
1. Conduct Gamma Automatic Adjustment. ･For user [Adjustment] →[Execute Adjust Operation]→[Gamma Operation]→[Gamm a Automatic Adj.] → [OK］ → [Exit [Adjustment]] After returning to the normal screen, the Gamma Automatic Adj. is executed automatically. automatically. ・For CE [Service] →[Process Adjustment] →[Drum Peculiarity Adj] →[Automatic Adjustment] Note Symptom will will mostly disappear after driving drum several times. required.
So, replacement replacement of DU DU is not
2. Print halftone image in each CMYK to confirm the symptom is improved. When the symptom is not improved, conduct Gamma Automatic Adjustment again. Note Since the symptom possibly occurs in other color, check halftone image for each CMYK.
contents Table of contents
- 81 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5 1.5.1 .17. 7. Wavy Wavy uneven un even densit dens it y at the t he edge (1) Symptom Uneven density in wavy shape occurs on the image. It tends to occur at the last half or edge of large size.
It more often occurs on 2-sided print.
Feed direction
(2) Cause Due to the paper curl amount and the stiffness, the posture of the paper is not kept optimum before fusing. Consequently, Consequently, the image before fusing is rubbed causing wavy uneven density and gloss difference. (3) Solution 1. Change the curl adjustment (main body Decurler setting) to [+1] (Weaker) in administrator mode or user mode. (Default value is [+2]) [ +2]) ・[Utility/Counter]→[Administrator Setting]→[Common Setting]→[Curl Adjustment]. ・[Utility/Counter]→[User Setting]→[Common Setting]→[Curl Adjustment].
Note: When the other type of paper is used for next job, return the setting sett ing to the original value v alue before next job starts. Otherwise, the corner folding, paper skew or wrinkle which is caused by the curl may occur. 2. Decrease the fusing upper belt temperature by every 5ºC. [Paper Setting]→[Change Set]→[Expert Adj.] ・[Fus.T-B [Fus.T-Belt elt Center Temp.(Print)] ・[Fus.T-Belt Edge Temp. (Print)]] Note: ･When the Expert Adj. is not indicated, change the DIPSW DIPSW1-0 1-0 (To (To show Expert Adjustment in the Paper Setting) from “0” to “1” (Show). ･When the temperature of the fusing belt decreases, th the e gloss level becomes lower. ･When the temperature of the fusing belt decreases too much and imperfect fusing offset (toner repels as the fusing temperature is low) may occur. 3. Increase fusing lower roller temperature by every ever y 10ºC and check the effect. (Max 20ºC increase)) [Paper Setting]→[Change Set]→[Expert Adj.] ･[L-Fus. PressRoller Center(Idle)] 4. Change the Lower Fusing Roller Ro ller Cooling Fan Air level to weak or OFF [Paper Setting]→[Change Set]→[Expert Set]→[Exp ert Adj.]→[Fusing Roller Cooling Fan Air level] Note ･ When the above 3 and 4 are conducted, the gloss on the 1st page of duplex job may
become too high. 5. Change the paper set direction in the tray. 6.
If the step 1 through 5 are not effective, effective, ask customer to user d different ifferent type of the paper so that paper grain runs parallel to the paper conveyance direction.
Table of contents contents
- 82 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.5 1.5.1 .18. 8. Embos s paper (text ur ured ed paper) (1) Symptom Though emboss unit is used, image density is lighter on the emboss paper (textured paper). (2) Cause The emboss unit setting may not be optimum. o ptimum. (3) Solution Print image for each “ON(LOW)” and "ON (High) setting. Set the paper weight and confirm print pr int each of ON (Low) and ON (High) ( High) of the Unevenness setting. If the improvement is not enough, go to following.
1. Fusing ability: Toner is not fused well at the concave of the emboss paper and toner detaches from the concave then paper gets soiled by unfused toner. Check item: 1. Check the]→[ speed is setSetting to low]→[Weight]→Speed Setting [Paper that Setting Change List of speed AccurioPress C6100 AccurioPress C6085
High 460mm/s 400mm/s
[Speed Setting] Setting Middle 400mm/s -
Low 230mm/s 230mm/s
2. Increase the fusing temperature and check the effect [Fus.T-Belt Center Temp (Print)] and [Fusing T-Belt Edge Temp. (Print)] When the unevenness setting is set to ON, max adjustment range becomes +40 degrees. So Try every 10 degrees degrees increase and confirm the print. . (When the unevenness setting is set to ON, the fusing temperature is increased incr eased by +20 degrees autom automatically atically.) .) Note: When the fusing temperature is increased, the gloss becomes higher. 2. Transfer ability is poor ： Color is different at the concave part of the emboss paper. Check item:toner refresh mode and check the result. 1. Conduct
After conducting the toner refresh mode, print with both ON (Low) and ON (High) for f or the Unevenness setting again.
- 83 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 2. Change the 2nd transfer output and check the result. (1) Set the unevenness setting ON (Low) then change the 2nd Transfer Output Adj. (Front)
to "0". If the problem does not occur occur,, register the setting to the paper profile. (2) When the improvement is not enough, prints with other 2 settings mentioned in the table and compare the result among three. Combination of the setting to compare Unevenness Setting ON (Low) ON (Low) ON (High)
2nd Transfer Adj. (Front)
Output 0 +15 +30
Select the best one including including the one one taken at previous step. From the best one, change the setting in the range +/- 10 and search the optimum setting for the 2nd Transfer Output Adj. (Front). Note: Regarding the 2nd transfer, the relation between 2nd transfer and transfer output changes drawing the curve having the peak. It iis s necessary to search the peak. When the optimum setting is found, register the value to the paper profile. y t i l i b a r e f s n a r T
Optimum Range
Transfer output Fig. Image of the relation between transfer ability and transfer output
• When performing duplex print on emboss paper, enter the same value to the 2nd 2 nd Transfer Output Adj. (Back) as the 2nd Transfer (Front) and check the image. • Depending on the storage condition of the paper, the moisture content of the paper may changes which changes the resistance on the paper surface. This may shift the optimum optimum 2nd transfer output. So, KMI KMI strongly recommends to store paper in the damp-proof paper wrapped wrapped state. If print result changes even applying the paper profile, re-adjust the 2nd Transfer output. • Other notes
When the emboss setting is turned ON, do not use Preset button. Though the preset mode is selectable, if the Preset button is used to change the setting, fusing temperature becomes lower lower than emboss emboss mode setting. setting. So, poor fusing fusing may occur which may soil the paper path in the worst. When the emboss setting is turned ON, do not use Preset button.
Table of contents contents
- 84 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
1.6.1. Darker/Lighter approach)
image
density
and
background
(CSRA
(1) Symptom Image density is entirely darker /lighter or background occurs. (2) Cause There are plural probable causes.
List up the probable causes using the CSRA.
(3) Solution The CSRA determines the entire state of a machine from the acquired data then displays a list of the probable causes with the solution in the order of higher probability on the PC or mobile screen. Try the solution from the top of the llist. ist. When the he symptom is not solved, go to the next item.
1. Press the Administrator Call. *[Setup menu] -> [Administrator settings] -> [System linkage] -> [Administrator Call]
2. Access to the following URL of CSRA (CS Remote Analysis) Analysis) after 5 minutes. (It takes max. 5 minutes for CSRA system to register data.) https://csra.konicaminolta.jp https://csra.konicaminolta.jp Note *To *To login the CSRA, you need to enter your User ID and Password. For more information, please refer to TNBT1600039 *.
- 85 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
PC View
Mobile View
3. Select [Troubleshooting] button.
PC View
Mobile View
4. Select [Sales Office], [Model], [S/No] and [Period] in search items.
PC View
And press [Apply].
Mobile View
- 86 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
5. After checking the date time of the search results, select the trouble that applies from the dropdown list of [Symptom] for troubleshoot and press [Apply].
PC View
Mobile View
6. Perform the procedure in the displayed order. (Cause, problem location and solution are displayed in the order of a higher probability.)
PC View
Mobile View
- 87 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
7. Record the result of the tried solution. ・Select the result from the drop-down drop-do wn list of [Interaction Item] below. ・Describe the detail of the solution you applied in the [Description] area. ・ After entering, press [Register].
PC View
Table of contents
Mobile View
- 88 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.1. Paper wave / Paper curl (1) Symptom Printed material has terrible wave and curl. (2) Cause •When paper with high rate of moisture absorption is used, the amount am ount of evaporated moisture differs at the center and edge of paper, which causes paper wave.
•When paper with high rate of moisture is used, the amount of evaporated moisture differs at the front and back of paper, which causes paper wave. (3) Solution •Wave 1. Reduce the fusing temperature by 10°C and check the result. gradually decrease by 20°C in maximum. m aximum.
If the improvement is not enough,
[Paper Setting]→[Change Set]→[Expert Adj.]→[Fus. T-Belt Edge Temp (Print)]
Note •When the Process Adj. is not indicated, change the DIPSW1-0 (To (To show process adjustment in the Paper Setting) from”0” to “1” (Show). •Since the optimal value differs from paper to paper, it is useful to register the individual setting to the paper catalogue. • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. 2. When the step 1 does not improve enough, suggest your your customer to change paper whose grain goes the same direction with feeding direction. •Curl 1. Change the De-curl adjustment settin setting g for RU and see ifif the symptom is improved. [Paper Setting]→[Change Set]→[Curl Adjustment]
2.
Decrease the fusing temperature by 5 ºC step (Maximum -10 ºC) and check the effect. [Paper Setting]→[Change Set]→[Expert Adj.] ･[Fus.T-Be [Fus.T-Belt lt Center Temp. (Idle))] ･[Fus. T-Belt Center Temp (Print)] ･[Fus. T-Belt Edge Temp (Idle)] ･[Fus. T-Belt Edge Temp (Print)] ･[L-Fus. PressRoller Center(Idle)] ･[L-Fus. PressRoller Center(Print)] Note •When the Expert Adj. is not indicated, change the DIPSW1-0 DIPSW 1-0 (To (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). •Since the optimal value differs from paper to paper, it is useful to register the individual setting to the paper catalogue. • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode]
- 89 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper. 3. goes Whenthe thesame step direction 2 does not improve enough, suggest the customer to change paper whose grain with feeding direction. contents Table of contents
- 90 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.2. 2.1. 2. Fusin Fusin g w rapping jam (1) Symptom When the image with a little margin at leading edge is printed on thin paper (specifically coated paper) and the image density densi ty is dark, the fusing wrappi wrapping ng jam may occur. (2) Cause When the paper is very soft and toner attachment on paper is high, the paper cannot be separated
from the fusing belt. (3) Solution 1. Adjust the lead edge erase amount to create the blank area at the leading edge. [Paper Setting]→[Change Set]→[Expert Adj.]→[Lead Edge Erase Quantity]
Note •When the Expert Adj. is not indicated, change the DIPSW1-0 (T (To o show expert adjustment adjustm ent in the Paper Setting) from ”0” to “1” (Show). •Since image data is deleted for the lead edge, check the print data of customer’s job and show it to the customer to get understanding on the image erase amount. When the lead edge erase amount setting is not accepted b by y the customer, go to next step. 2. Change the total amount save setting from “OFF (default)” to “ON” and check whether the symptom is improved. [Paper Setting]→[Change Set]→[Expert Adj.]→[T Adj.]→[Toner oner Amount Save]
Note When the Toner Amount Save is set to “ON”, reproduction of shadow and dark saturated color may become poorer. When this solution is not acceptable for customer, go to next step. 3. Reset the total amount save setting from OFF to ON (default), decrease the fusing temperature by 5 ºC step (Maximum -10 ºC) and check effect. [Paper Setting]→[Change Set]→[Expert Adj.] ･[Fus.T-B [Fus.T-Belt elt Center Ce nter Temp. (Idle)] ･[Fus. T-Belt Center Temp (Print)] ･[Fus. T-Belt Edge Temp (Idle)] ･[Fus. T-Belt Edge Temp (Print)] Note • When the temperature is reduced too much, "fusing under offset" (Toner is peeled off because fusing temperature is not enough) may occur. Print test pattern No. 53(1 sheet) in order to check if "fusing under offset" symptom occurs. Press [Service Mode]→[T Mo de]→[Test est Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [T [Test est Pattern Pattern]: ]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 0 [Gradation-K]: 255 Press [Print Mode] then print on customer's paper.
- 91 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 4. If the step 3 does not solve the symptom, change the air level of fusing separation air. Set “Strong” for the Fusing Air Separation Air Level. [Paper Setting]→[Change Set]→[Expert Adj.]→[Fusing Air Separation Air Level Setting] Note ･When the air level is too strong, the air air blows the paper to the downward strongly. strongly. At that time, the image on the down-side of sheet has image (the side not fused such as Side 1 of duplex), it is scratched by the fusing separation and the scratch mark is visible. ･When the steps 4 and 5 are both applied, if the air blow level is too high, the temperature of fusing belt upper gets lowered at continuous printing and fusing under offset may occur. contents Table of contents
- 92 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.3 Vertic al Conveyance Conveyanc e jam (J-1619 (J-1619)) and corn co rner er folded fo lded (do g ear) 2.1.3.. Vertic (1) Symptom At the joint of PFU vertical conveyance and horizontal conveyance, J-1619 or paper corner folding occurs. (2) Cause When ∩ curled thin paper is fed and goes go es through the vertical conveyance paper path and reaching
to the horizontal conveyance path, it fails to enter the horizontal conveyance paper path and buckling jam occurs at joint part. • Jam occurrence position
Vertical conveyance paper path
Horizontal conveyance paper path
Joint part • Paper curl state which causes the jam (View grabbing the short edge of paper,)
Feed direction 50mm
•
When When the the lead lead edge edge o off the the pape paperr curls curls 10mm 10mm or more, jam may occur.
•
When When the the pape paperr is is se sett iin n oppo opposit site e curl curled ed state, state, paper corner may be folded
10mm (3) Solution 1. Press the paper by b y hand to correct the c curl url before setting them to the tray.
2. If not improved by step 1, ask customer to use the paper fresh from unpacking. 3. If not improved by step 2, ask customer to tr try y another lot of paper or different type of paper. Table of contents contents
- 93 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1. 4. Ligh t hit tin ting g mark at edge of thick paper 2.1.4. (1) Symptom When the thick paper is fed, the leading edge of the paper slightly gets damaged. Part of leading edge is slightly bent to downward. The bent direction for the 1-soded print is the leading edge of the blank side. (At 2-sided print, trailing edge of the side2.) ・ The symptom tends to occur when the paper is more than 200gsm and also also apply to one or more of the following; ・The stiffness is high to the thickness direction ・Friction against the rubber is high ・Paper edge is rough after cutting. ・ It tends to occur when the paper is set to the upper or middle tray of the PFU directly connected to the main body and
Feed Direction (simplex)
Feed Direction (Duplex)
Photo of the symptom (paper edge) Occurs at the leading edge of paper (Position: randomly in the range +/-118.5mm from the center in front to rear direction) (2) Cause (a) The paper is bent when it stops at the rubber PFU registration roller (rubber). (b) The paper is bent when the registration roller starts reverse rotation at the 1st page printing. (During feed correction at the registration.) (c) The paper is bent when it stops at the main body registration roller at the 1st page printing.
(3) 1. Solution the Feed Correction. Turn OFF [Paper Setting]→[Change Set]→[Expert Adjustment]→[Feed Correction] Note ・ When the Expert Adj. is not indicated, change the DIPSW1-0 (To (To show expert adjustment in the Paper Setting) from ”0” to “1” (Show). ・ Applicable when the weight is less than 351 gsm. ・ When the weight is 351 gsm to 400 gsm, the feed correction is automatically set to OFF. OFF. So, go to step 2.
2. Change the pre-registration loop amount of the PFU Reduce the setting value of the PFU pre-registration loop till the symptom is improved. [Paper Setting]→[Change Setting]→[Expert Adjustment] →[Pre-regist. Loop Adj.(Front)] 3. Change the registration loop amount front of the main body Reduce the setting value of the Registration Loop (Front) till the symptom is improved. [Paper Setting]→[Change Set]→[Expert Adj.]→[Registration Loop (Front)]
4. Change paper set direction If possible, change paper set direction.
Turn the paper upside upside down (It is effective effective when the
- 94 -
KONICA MINOLTA MINOLTA Confidenti Confidential al bur generated during the paper cut is in downward.) 5. Cha Change nge paper paper tray If possible, use the bottom tray of the PFU directly connected to the main body.
contents Table of contents
- 95 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.5. 120 x 235 mm size envelope corner folding (dog ear) at the machine rear rear si de (1) Symptom Corner folding (dog ear) occurs at the leading edge of the machine rear s side ide on the envelope of the 120mm x 235mm size (three-fold of the A4 size) (2) Cause
The lead-rear corner of the 120mm x 235mm size envelope is caught by the drawing dra wing for the roller at the paper exit guide upper that causes the corner folding. Since the roller position is asymmetric to the center and corner folding occurs o ccurs only at the machine rear. Paper exit unit front perspective view
Corner folding occurrence position Enlarged view of the drawing part
Cross section of the Drawing part
Corner of the envelope is caught by the drawing part Bottom view of the drawing part
front Envelope position When the symptom occurs Feed Direction
The envelope is caught by the drawing part
Envelope position after taking countermeasure
The envelope path shifts to the machine rear and is not affected by the drawing part.
When the 120 x 235 mm size envelope is fed passing the center of the paper path, the corner folding does not occur. occur. When, however, the paper passes 3.2mm front from the center, center, it is caught and corner folding folding occurs. The tolerance for the paper feed position is is 4.0mm in the maximum so, the above mentioned problem may possibly occurs.
- 96 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution
1. When the corner fold of the envelope o occurs, ccurs, check the scale of the side guide in the PFU tray. tray.
2. Adjust the position of the side guides top. They should be shifted to machine rear by 3mm. Release the lock of the side guides at machine front and rear then lock it again after moving the top of the guide to machine rear side by 3 mm.
Machine front side
Machine rear side
Example: When the symptom occurs and if the scale indicates Front; 164 and rear; 164, Adjust to indicate indicate front; 170 and rear; rear; 158.
Table of contents contents
- 97 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1. 6. Ima Image ge lacking for the max print pr int size size 2.1.6. 1
Symptom Image at the one side lacks when printing the max print size or around (not printed at the edge of the paper )
2
Cause Paper position is slightly off-centered and unable to print he maximum size.
3
Solution Steps 1. Disable the centering adjustment adjustm ent for Trays 1 to 3. ・[Service]→[Machine Adjustment]→[Printer Adjustment]→[Centering Adjustment] →[Centering Sensor Gap Adj.]: Enter [0] ・[Service] →[Machine Adjustment]→[Printer Adjustment]→[Centering Adjustment] →[Centering Adjustment]: Enter 0 for Trays 1 to 3. ・[Service]→[System Setting]→[Software DIPSW Setting]: Change [26-4] to [1]. ・[Both Sides] adjustment → Perform [Reset (Front/Back)] for Trays 1 to 3. 2. Print from trays 1 through 3 and check the image off-center level without any correction. 3. Turn OFF the sub-switch (SW2) and main switch (SW1) and unplug the power cable from the socket. 4. Disconnect the PF from the main body (Refer to the installation manual)
5. screws Remove[3]the screw [2] for the PF positioning bracket/Fr Up and loosen the installation (2 installation pcs). 6. Remove the installation screw [2] for the PF positioning bracket/Fr Lw [1] and loosen the installation screw [3 (2 pcs). Note ・ PF installation position is adjustable by the installation p positions ositions of the PF positioning brackets/ Fr Up[1] and Fr LW [1] ・ When the installation screw [2] is fixed: PF positioning brackets /Fr Up [1] and Fr Lw[1] comes to the standard position.
7. Referring to the off-centered amount checked at the step 2, move the PF positioning bracket/Fr and Lw to front or rear to adjust the center position. Note ・ When off-centered to machine front direction: Move Move PF positioning brackets/Fr Up [1] and the Fr LW LW to machine front or rear direction. ・ When off-centered to machine rear direction: Move Move the PF positioning brackets/Fr Up and
the Fr UP to machine rear direction. 8. Tighten the installation screws [3] (4 pcs) and [2] (2 pcs). 9. Connect the PF with the main m ain body. body. 10.Plug the power supply cable of the main body to the wall socket then turn ON the main SW (SW1) and sub SW (SW2). 11. Prints from Trays 1 to 3 and confirm no image lacking lack ing occurs. 12. If the symptom still occurs, repeat steps 3 through 10. 13. On DIPSW, turn ON the printer off-center correction for f or the (PF) to ON. [Service]→[System Setting]→[Software DIPSW Setting]: Change [26-4] to [0].
- 98 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
[3]
[2]
[1]
[3]
[2]
[1] Table of contents contents
- 99 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.7 Paper per wr ink le on t he 2nd side 2.1.7 Pa (1) Symptom Paper wrinkle occurs at the trailing edge of the OK top coat 128gsm, Machine rear
Paper Feed direction
2nd side
Paper wrinkle
Machine front Paper wrinkle may also occurs at front side.
(2) Cause During feeding the 2 nd side, the main body registration loop shape turns unstable at the main body registration section causing the paper wrinkle to occur.
Rear loop shape : Less loop
Paper
Paper feed direction
Loop roller
Registration roller Paper Front side loop form; Normal
Paper As shown in the above, the loop form is different at machine front and rear. With the state, the wrinkle occurs at the less loop formed part. (3) Solution 1. When the wrinkle as shown in the top of the page occurs on the 2 nd side of the OK top coat, 128gsm, apply the following paper profile. (2nd side loop amount is optimized for the OK top coat) ・"OK top coat 128gsm, Short grain" ・"OK top coat128gsm, Long grain"
* Select the Short grain or Long grain matching to the paper being used. 2. Change the curl adjustment (main body Decurler setting) to [+1] (Weaker) in administrator mode or user mode.
- 100 -
KONICA MINOLTA MINOLTA Confidenti Confidential al ・[Utility/Counter]→[Administrator Setting]→[Common Setting]→[Curl Adjustment]. ・[Utility/Counter]→[User Setting]→[Common Setting]→[Curl Adjustment].
Note: When the other type t ype of paper is used for the next job, return the setting to the original value. Otherwise, the corner folding, paper skew or wrinkle which is caused by the curl may occur. Table of contents contents
- 101 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.1.8 Separation failure at the 2nd transfer belt (J-3102/Fusing wri nkle/corner fol din ding g at lead lead edge) edge) (1) Symptom While printing on the thin paper, if the stiffness of the paper is weak and/or the paper is curling, following symptom may occur. ・J-3102
The paper is caught by the guide between transfer and fusing plate and does not reach to the fusing unit. Causing the jam to occur. ・Fusing wrinkle The paper is is caught by the guide between transfer and fusing. It reaches to the fusing unit but wrinkle occurs during fusing. Wrinkle at
・Corner folding
The leading edge of the paper is caught by the guide between transfer and fusing causing corner folding to occur. (2) Cause When the stiffness is low or the paper is curling, the paper separated from the 2 nd transfer belt is caught by the guides and jam/wrinkle at fusing/corner folding to occur. Guide between transfer and fusing unit 2nd transfer belt
Fusing unit
(3) Solution 1. When the paper loaded h has as been exposed to llow ow humidity ambient air or kept on on the PFU for a while, paper may get curled as it gets dried. Try just unpacked paper.
2.
Change the paper set direction.
3.
If the symptom occurs at the Side2, try the change of the curl adjustment (main body Decurler
- 102 -
KONICA MINOLTA MINOLTA Confidenti Confidential al setting) to [+1] (Weaker) in administrator mode or user mode.(Default setting is +2) [Utility]→[User Setting]→[Common Setting]→[Curl Adjustment] [Utility]→[Administrator Setting]→[Common Setting]→[Curl Adjustment] 4.
Depending o on n the problem occurring page side (Side 1 or 2), increase increase the 2nd Transfer output by every +10 and check if the symptom is improved. If not, change to miby every -10. Occurring at Side1 (Front) ・[Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj. (Front)] Occurring at Side2 (Back) ・[Paper Setting]→[Change Set]→[Expert Adj.]→[2nd Transfer Output Adj.(Back)]
Note ・When the Expert Adj. is not indicated, change the DIPSW1-0 (To (To show Expert Adjustment in the Paper Setting) from “0” to “1” (Show). ・When the setting is changed chan ged to much to + side, poor transfer may occur. ・When the setting is changed chan ged to much to – s side, ide, white spots may occur. contents Table of contents
- 103 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.2.1. Corner folding(dog ear) of small size paper (1) Symptom On small size paper (Width of B6S, 5.5x8.5S and around), the corner folding occurs.
Corner folding position
Feed Direction
(2) Cause When the leading edge of the paper is not sucked by the belt, the edge of the paper gets bent downward by the lead edge separation air. When the paper feed starts with this status, the edge of the paper hits the tray and corner folding occurs. •Symptom occurs when the edge of the paper is is too short to be sucked. (B5S, 5.5×8.5S e tc) (See the red line in figure below) •When the edge is pushed up by the floating 2nd sheet or later, the symptom does not occu r. (See the blue in figure below) Suction belt unit
1st sheet (OK case)
2nd or later sheets push up the edge of the 1st sheet (OK case)
1st sheet (NG case)
(a) Occurrence conditions ･High humid environment (The 2 nd sheet ascent is delayed by moisture in the paper) ･Paper weight is 91gsm or less. (When the paper is too soft, the edge tends to bow easily) (3) Solution 1. Select manual and reduce setting value from that of auto setting for [Lead E Edge dge Air Level Setting]. Setting]. [Paper Setting]→[Change Setting]→[Air Assist]→[Lead Edge Air Level Setting]
Table of contents
- 104 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.2.2. Wrinkle at the trailing edge (1) Symptom
When the thin paper (up to 91g/m 2) is fed from PF-707m/711, the wrinkle appears at the trailing trai ling edge of the paper. The symptom occurs more often when the Tray 3, 6 and 9 (bottom tray) is used and at the 1st page of a job. (Less occurrence from Tray 1 and 2, 4 and 5, 7 and 8 (top and middle trays))
Paper feed direction
Occur at the trailing edge of the paper. (Random position in the CD)
(2) Cause During the registration in the PFU, the paper lead edge posture become unstable. When the condition is kept till the paper enters to the rollers, wrinkle occurs. For the trays 3, 6 and 9 (bottom trays), due to the difference of the paper path, the symptom occurs more often and worse than trays 2, 4, 5, 7 and 8 (Upper and middle trays)
(3) Solution 1. Change the tray When the symptom occurs on the trays 3, 6 and 9 (lower), or 2, 5 and 8 (middle tray)
use trays 1, 4 and 7 (Upper trays)
2. Change of the PFU pre-registration loop amount Decrease PFU pre-registration loop amount till the wrinkle disappears. [Paper Setting]→[Change Set]→[Expert Adj.] →[Pre-regist. Loop Adj. (Front)] Table of contents
- 105 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.2. 3. Pickup jam clearance workf low 2.2.3. Introduction
Paper status in the tray largely af affects fects paper feed ability such as JAM and skew. From the experience, incorrect paper setting in the tray is one of the major factors causing JAM. Please thoroughly instruct user to set the paper in the tray w with ith the correct procedure. This will reduce jam occurrence.
1. How to set paper correctl y to the tray 1.1 How to set paper (basic procedure) i） Set a few sheets of paper to the tray and adjust the side guides with both hands . Note: Adjusting in one-handed, only one side guide moves and another side do not move well. may result in off-center in the tray.
When moving side guide, use the both hands as shown in the photo.
ii） Slide the knob at the side of the tray then close the tray.
Sliding the knob (see photo left) at the side of the tray can make adjustment without downing the lift up plate. (After sliding the knob, it is necessary to open and close the tray). This enables to make more precise adjustment of the gap between paper and side guides. After After adjustment, return the knob to the original position.
iii） Open the tray after the lift up plate reaches to the topmost position.
This
- 106 -
KONICA MINOLTA MINOLTA Confidenti Confidential al iv） Adjust the gaps between the paper and the side guides referring to the following steps 1 through 4. Note: Especially,, to keep Especially keep slight gap mention mention ed in 2 is import ant. Otherwise, JAM (non (non • suction, multi-feed, buckling) occurs. Manuall adjustments of s ide guides Manua 1. Side guide scale: Set the side guides so that the front and rear indicates the same val value. ue.
* Read the value at the edge of the steel plate. 2. Gap between papers and guides: Keep 0.1 to 0.2mm at each side 3. Fix side guide: Rotate the knob to fix. 4. Check the the paper can move smoothly: Slide the paper by hand and confirm that it moves smoothly. smoothly. * If it is caught, JAM may occur (see the figure in below) Reference 3. Rotate the knob to fix.
Front
Rear
1.
Set the side guides. Be sure that the steel plate indicates the same at front and rear scales
- 107 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Note: Example of NG state If the gap is not enough, paper is caught by side guides 2
Gap between paper guides: 0.1 to 0.2mm.
and
4 Slide the paper to arrowed direction and confirm smooth movement.
v） After step iv), return the knob to the original position then set a pile of paper paper..
Do not touch the side guides since they were already adjusted.
Only move the trail edge guide to load paper.
- 108 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 2.
Matrix to decide jam clearance When a jam occurs, take actions in order of following steps. i) Check the jam code ii) Check the paper status in the tray and whether the paper is set properly referring to “1. How to set paper correctly to the tray”. If the paper is not set correctly, set paper correctly and instruct user ho how w to set. iii) Take corrective actions according to jam code and paper status. Step 1
Step 2 Check paper status
Cheek Che ek JAM cod e
J16-01 J16-02 J16-13 J18-01 J18-02 J18-03 J20-01 J20-02 J20-03 J16-18 J16-20 J16-22 J18-08 J18-10 J18-12 J20-08 J20-10 J20-12 J16-31 J16-32 J16-33 J18-21 J18-22 J18-23 J20-21 J20-22 J20-23 J16-10 J18-49 J20-49
JAM code Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Multi-feed detection sensor 2nd PFU Multi-feed detection sensor 3rd PFU Multi-feed detection sensor
Step 3 Take corrective action
Remark
Description A. No t suctioned
Go to 3.2,a) 3.2,a)
B. Chain feed
Go to 3.2,b)
C. Buckling
Go to 3.2,c)
Not reaching to suction PS
Not reaching to exit PS
D .Mult .Mult i feed
Go to 3.2,d)
E. Conveyance failure
Go to 3.2,e)
C. Buckling
Go to 3.2,c)
F. No feed
Go to 3.2,f)
D. Multi-feed
Go to 3.2,d)
Not reaching to feed PS
Multi-feed detection
Before taking the individual corrective action, make sure that the paper is set properly in the tray.
- 109 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Supplement:
Details Details for paper paper status (Step (Step 2) B. Chain feed E. Conveyance Conveyance f ailure F. No f eed D. Multi-feed
A. Not su ct io ned
When the tray is pulled out, all the paper stays bottom of the tray. C. Buckling
Paper is folded at near leading edge.
When the tray is pulled out, the leading edge of the paper stops at around exit roller. D. Multi-feed
The paper stops at horizontal conveyance section with the paper overlapped state
- 110 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Action s to solve jam 3.1 Before starting adjustment 1. How to change air blow condition setting ・ Adjust the air level from paper setting Press [Paper Setting]→[Tray*]→[Change Set]→[Air Assist] to access air level setting screen
2.
How to check paper status Check through the small window which is standard equipment and at the top left of the PFU tray. Check window
Window for lighting
PF-707m/711
3.
Paper lead edge normal state ・ Following shows shows the normal floating state according to the air-level setting for the paper
weight. a) 80g/m2
Flo ating paper
Floating sheets are separated one by one
b) 300g/m2
Floating paper
Floating sheets are separated one by one
3.2 Corre Corrective ctive action according to condit ions a) Not Not suc tioned a)-1 a)1 Humidi Humidi ty is hig h ・ Turn on heater (Installation of HT-506 is is necessary.) * Especially for coated paper and smooth plain paper * Especially for the 257g/m2 and heavier paper, pa per, the symptom is more likely to occur.
i) [Utility]-[User Setting]-[System Setting]-[Paper Tray Setting] - [Dehumidify Fan Heater] ii) [Fan Heater Control (Tray**)] = [Auto] (For coated paper) [Compulsory ON] (For Plain paper, Fine paper)
- 111 -
KONICA MINOLTA MINOLTA Confidenti Confidential al a)-2 a)2 Insuff Insuff icient flo ating Example of insufficient floating
The sheet slightly delayed to float • Check the paper floating conditions • Set [Side Air Level Setting] stronger. stronger. • For paperweight 176g/m2 or or llighter ighter paper 1. Check the air level ・Press [Paper Setting]→[Tray*]→[Air Assist] to access air level setting screen. ・When the [Side Air Level Setting]=9, go to the countermeasure 2 (lock the side-guide) side-g uide) 2. Change the air assist setting for the tray to [Manual] 3. Set [Side Air Level Setting] stronger by every 1 step. ・ Lock the side guide * For the 177g/m2 or heavier paper ・ Lock the side guide. ・ Lock both front and rear guides.
- 112 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide]
[After locking side guide]
・ Remove the flap of the side side guide * For 177g/m2 or heavier paper 1 .Lock the side guide. 2. Remove the flap from front then rear.
Before removing front flap
After removing the flap
Flap
* With stronger air and the wider space to separate sheets the more sheets can be separated at a time.
- 113 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Move the upper limit detection position upward
Lever at upper position Air hit the lead edge Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends. → The lead edge air separate separ ate the sheets more effectively.
b) Chain-feed b)-1 Humidity is hi gh • Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth plain paper * Especially, Especially, the symptom tends to occur when the paper weight is 2 257g/m 57g/m2 or heavier.
i) [Utility] →[User Setting] →[System Setting] →[Paper Tray Setting] →[Dehumidify Fan Heater] ii) [Fan Heater Control (Tray**)]=[Auto] (Coated paper) [Compulsively ON] (Plain paper and Fine paper)
- 114 -
KONICA MINOLTA MINOLTA Confidenti Confidential al b)-2 Too Too m any sheets are flo ating
• Sheets of of paper are floating without separation. • When the belt starts to to feed, the next sheet enters to the paper path without being separated. When the paper is curling, change the paper set direction as shown in the figure. • Set [Side Air Level Setting]: weaker When the set direction cannot be changed, correct the curl before setting the paper. 1. Change the air assist setting for the tray to [Manual] Feed direction 2. Set [Side air level] weaker by every 1 step. (Machine Front view) • Move the upper limitation detection position upward. • Set the [Lead Edge Air Level Setting] weaker. * For the size which needs auxiliary guide (140mm or less width) 1. Push up the upper limit detection position change lever
Upper position Lead edge air hits the sheets Normal position * When the lever is set at upper position, sheets of paper before separation ascends. → The lead edge air separate the t he sheets more effectively. 2.
Change the air assist setting for the tray to [Manual]
3.
Set [Lead Edge Air Setting] weaker by1 level
- 115 -
KONICA MINOLTA MINOLTA Confidenti Confidential al • Lock the side guide • Set [Side Air L Level evel Setting] weaker * For the size not using the auxiliary guide (140mm and more width) paper 1. Lock the side guide * Lock both front and rear guides.
* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide]
[After locking side guide]
2. Change the air assist setting for the tray to [Manual] 3. Set [Lead Edge Air] weaker by1 step ・Lock only the side guide at front ・Set the Lead Edge air/Side Edge Air weaker *Applicable to the size like B5S, A5S (182mm or less width) and 257gsm or heavier paper. When the paper is curling, change the paper set direction as shown in the figure below. When set direction cannot be changed, correct the curl before setting the paper. (Ideal status is the paper is flat). Paper feed direction direction Machine front view b)-3 Symptom occurs on the specific type of paper • Change PFU paper float timing to Delay [Paper Setting]→[Change Set]→[Expert Adj.]→[PFU Paper Float Timing]→[Delay]
- 116 -
KONICA MINOLTA MINOLTA Confidenti Confidential al c) Buckling c)-1 Lead edge gets ∩-sha pe curl dur ing floating ∩-shape Floating condition when the lead edge∩ shape curl
Floating sheets are declining; Leading edge of the floating sheets is lower than others. Check the paper curl direction in the tray • Set the paper upside down • Set [Lead Edge Air Setting] weaker c)-2 Thin paper lead edge buckli ng
When the 1st sheet is conveyed, the leading edge of the next sheet is largely curls downward. • Set [Lead Edge Air Setting] Weaker 1. Change the air assist setting for the tray to [Manual] 2. Change [Lead Edge Air Level Setting] by every ever y 1 step.
- 117 -
KONICA MINOLTA MINOLTA Confidenti Confidential al d) Mult i-feed i-feed JAM sheets (at horizontal conveyance section) are overlapping and the leading edge of the 1st sheet is at the downstream against that of the 2 nd sheet.
Fig. Multi-feed JAM paper at horizontal conveyance (1 st sheet advance further than 2nd sheet)
1st sheet
2nd sheet * 1st sheet advances f urther than 2nd sheet. JAM sheets (at horizontal conveyance) overlaps completely and the leading edge position does not change between 1st sheet and the 2nd sheet. Figure．Multi-feed (no difference in lead edge) position
1st sheet
2nd sheet * Multi-feed.
Overlapping completely without shifting leading edge.
JAM sheet (at horizontal conveyance section) overlaps and the leading edge of the 1st sheet is at upstream against that of the 2nd sheet. Fig. Multi-feed (1st sheet is at downstream), JAM at horizontal conveyance paper
1st sheet
2nd sheet *The leading edge of the 1st sheet is at the upstream of the 2nd sheet
- 118 -
KONICA MINOLTA MINOLTA Confidenti Confidential al More than 2 sheets of the papers stop at the feed roller section Fig. Multi-feed (2 sheets or more) feed section JAM paper state
d)-1 Humidity is hi gh Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth surface sur face plain paper d)-2 In case of the Symptom 1 and and Sympt om 4. →Take →T ake the action explained exp lained for the b) Chain feed of the s ame cause.
•
Sheets of paper are floating without separation. ・Next sheet is not separated when the belt starts to feed and enters to the feed path.
•
Set the [Side Air Level Setting] weaker
1. Change the air assist setting for the tray to [Manual] 2. Set [Side Air Level Setting] weaker by every 1 level.
When the paper is curling, change the paper set direction as shown in the figure. When the set direction cannot be changed, correct the curl before setting the paper.
(Machine Front view) ・Move the upper limitation position upward. ・Set [Lead Edge Air Level Setting] weaker * Applicable to the size which needs auxiliary guide (140mm or less width)
- 119 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 1. Move the upper limitation position upward.
Lever at upper position Lead edge air hits the sheets Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends. →The setting lead edge air separate the sheets more effectively 2. Change the air assist for the tray to [Manual] 3. Set [Lead Edge Air Level Setting] weaker by every ever y 1 step
・Lock the side guide ・Set the [Lead Edge Air Level Setting] to weaker * For the size which does not need auxiliary guide (140mm or more width)
1. Lock the side guide * Lock both side guides at front and rear.
- 120 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide]
[After locking side guide]
2. Change the air assist setting for the tray to [Manual] 3. Set [Lead Edge Air Level Setting] weaker by every ever y 1 step ・Lock a side guide at machine front. fr ont. ・Set both of Lead Edge Air Level/Side Air Level weaker. * For the size like B5S, A5S (182mm or less width) and 257gsm or heavier paper. 1. Lock the side guide * Lock a side guide at front only. only. When both sides are locked, locked, thick paper feed failure may occur due to the friction fr iction of the paper.
*By locking, the duct opening is narrowed →Separate air speed increase and paper separation performance is enhanced * By locking only front side, minimize the increase of friction [Before locking side guide] [After locking side guide] 2. Change the air assist setting for the tray to [Manual]. 3. Set both of the [Lead [L ead Edge Air Level Setting]/[Side Air Level Setting] weaker by every 1step.
- 121 -
KONICA MINOLTA MINOLTA Confidenti Confidential al When the paper is curling, change the paper set direction as shown in the figure below. When set direction cannot be changed, correct the curl before setting the paper. (Ideal status is the paper is flat). Paper feed direction direction Machine front view
d)-3 For For Sympt om 2 Insufficient separation
Floating sheets are not separated
Floating sheets are partly not separated
• Check the paper floating conditions • Side air level: Set stronger. *Applicable for the 176g/m2 or less paper 1. Check the air level. ・ Press [Paper Setting]→[Tray*]→[Air Assist] to access air level setting screen scr een When [Side Level Setting] set to 9, to countermeasure 2 (lock the side guide) 2. ・Change the airAir assist setting for is the tray to go [Manual] 3. Set the [Side air level Setting] stronger by every 1 step.
- 122 -
KONICA MINOLTA MINOLTA Confidenti Confidential al ・ Lock the side guide. * Applicable Applicable to the paper with the 177g/m2 ore heavier ・ Lock the side guides ・ Lock both guides at front and rear.
d)-4 Symptom 3 case
Sheets floating state at symptom 3
1st sheet is send back to the upstream and sticking ・Set the lead edge air level weaker. i) Change the air assist setting for the tray to [Manual] ii) Set [Lead Edge Air Setting] weaker by every 1 step. ste p.
When the paper is curling, change the paper set direction as shown in the figure. When the set direction cannot be changed, correct the curl before setting the paper. Paper feed direction (Machine front view)
- 123 -
KONICA MINOLTA MINOLTA Confidenti Confidential al When the paper is curling, change the paper set direction as shown in the figure below. When set direction cannot be changed, correct the curl before setting the paper. (Ideal status is the paper is flat). Paper feed direction Machine front view e) Conveyance failure e)e)-1 1 Leading edge gets ∩-shape ∩-shape curl Leading edge gets ∩-shape curl
Floating sheets are declining:
Leading edge of the floating sheets is lower than others
• Check the paper curl direction in the tray • Set the paper upside down • Lead edge air level: Set weaker i) Change the air assist setting for the tray to [Manual] ii) Set the [Lead Edge Separation] by every 1 step. f) No feed f)-1 When humidity is h igh • Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth surface plain paper 1. [Utility]-[User Setting]-[System Setting]-[Paper Tray Setting] -[Dehumidify Fan Heater] 2. [Fan Heater Control (Tray**)]＝[Auto] (Coated paper) [Compulsively ON] (Plain, Fine paper) f)-2 f)- 2 Leading edge gets ∩-shape ∩ -shape curl Leading edge gets ∩-shape curl
- 124 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Floating sheets are declining; Leading edge of the floating sheets is lower than others. • Check the paper curl direction in the tray • Set the paper upside down • Lead edge air level: Set weaker 1. Change the airEdge assist the tray to [Manual] 2. Set the [Lead Airsetting Level for Setting] weaker by 1 step.
contents Table of contents
- 125 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.2.4 Thick paper jam due to multi-feed (1) Symptom ・Multi-feed jam may occur on thick paper (257gsm or heavier) . JAM code: J-1610/1849/2049 J-1646/1647/1648/1846/1847/1848/2046/2047/2048 * When the paper inside the tray forms convex toward the bottom of the tray, curl tends to occur. (2) Cause The lead air lifts up the 2nd and later sheets causing multi-feed. ・
Feed direction
Lead air (3) Solution
thick paper. ・ Fit the attachment for the thick
Thick paper attachment
1st sheet
2nd sheet
Note: When the thick paper attachment is fitted, following jam may occur. JAM code: J-1618/1620/1622/1808/1810/1812/2008/2010/2012. In that case, remove the thick paper attachment then take the countermeasure mentioned in the ” Pickup jam clearance clearance workflow”
contents Table of contents
- 126 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.2.5 J-1618/1620/1622 (PFU No feed jam as paper does not reach to PFU exit sensor) (1) Symptom No feed jam occurs as the paper does not reach to the PFU exit sensor. Subject JAM code 1st PFU : J-1618/1620/1622 nd
2 PFU : J-1808/1810/1812 3rd PFU : J-2008/2010/2012 (2) Cause When the paper restarts after temporary stops, the paper feed belt (CL) assist the feed for the specific duration. Occasionally, the set time is not enough to drive the CL then failed to convey the paper to the exit roller then the next exit sensor does not detect the paper, resulting in JAM.
Exit sensor
NF Sensor Exit roller
(3) Solution 1. Update the main body firmware to the following or later version. I-ROM: G00-11 C-ROM：G00-11 After updating the firmware, the new control is applied as default. DIPSW184-2 =0: New control (Default) =1: Conventional control Details of the new control: • For
the 180.0mm or longer paper Feed CL is kept ON till the t he leading edge of the paper reaches to the following exit sensor. (Sensor name is different by the position of the tray) • Upper tray = Upper exit sensor • Middle tray = Middle exit sensor • Lower tray = Horizontal conveyance sensor/1
• For the
179.9mm or shorter paper, feed clutch is kept ON for 24msec (the same as conventional control) 2. For the 179.9mm or less paper, (not specific for paper weight),if the symptom occurs, Extend the feed time by the following following DIPSW. Find the optimum optimum setting. setting. Note: • It is effective when the DIPSW184-2 DI PSW184-2 is set to 0 • Before extending the feed time, check that the side guide is not set too tight. DIPSW184-0 DIPSW184-1
Normal (Default) Extend by +20ms Extend by +30ms Extend by +50ms
0 1 0 1
0 0 1 1
Table of contents contents
- 127 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.3.1. 2.3. 1. Pa Paper per sti ck w ith ea each ch other o ther due to static ele electr ctricit icit y (1) Symptom When the printed paper stacked on the output tray, the paper gets static electricity and following symptom occurs. The symptom tends to occur when a high coverage job is printed in duplex on the coated paper (surface smooth paper) or uncoated paper. More occurrence is seen on coated c oated paper. ・ ・ ・ ・ ・ ・
Output paper is not aligned Output paper stick to the exit tray Staple position shifts. No feed jam or double feed jam occurs on off-line finisher Center folding is not performed correctly Paper curls on the exit tray
(2) Cause While stacking the paper on the tray, paper stick or repel and move due to the static electricity on the paper. (3) Set Solution the [Output Paper Separation Setting] for each paper type. [Paper Setting]→[Change Set]→[Expert Adjustment]→[Output Paper Separation Setting] ON(Coated) : Apply current at duplex print when Coated paper is specified. ON(Uncoated) : Apply current at duplex print when Uncoated paper is specified. Manual : The manually adjusted current is applied. OFF : No current application
Note • When the Expert Adj. is not indicated, change the DIPSW1-0 (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). ( Show). 3. When the symptom is not improved after setting the optimum for the [Output Paper Separation Setting] per paper type, select [Manual] and set [Offset Value]. Test the several offset values mentioned in below steps to find the best result. 1. Access Test Pattern Output mode of servi service ce mode and enter following value. Mode]→[Test Pattern Output Mode] [Service Mode]→[Test Mode]→[Test [Test Pattern]: 53 [Gradation-Y]: 0 [Gradation-M]: 255 [Gradation-C]: 255
[Gradation-K]: 0
- 128 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Press [Print Mode]
2. 3.
Load the large size such as A3 a and nd 1 11x17 1x17 to the tray. tray. In [Print Mode], select [1→2] and [Full Color].
- 129 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.
From [Paper Setting], select the tray and access to the [Output Paper Separation Separation Setting] in the Expert Adjustment [Paper Setting]→[Tray]→[Change Set]→[Expert. Adjustment]→ [Output Paper Separation Setting]
5.
Change [Offset Value] to the following and print 20 sheets on on large size such as A3 or 11x17. The offset value : -30/-20/-10/+10/+20/+30
6.
Select [OFF] [OFF] for the [Output Paper Separation Separation Setting] and print 20 sheets on large size such as A3 (11 (11x17) x17) (Reference) When the coverage is high on Side1 and low on Side2, Side2, the better result result is expected when the + (positive) value is set. When the coverage is low on Side1 and high on Side2, the better result is expected Note:
7. 8.
Before printing, check that the ON(Coated) and ON(Uncoated) is selected correctly. ON(Coated) : Apply current at duplex print of Coated paper. ON(Uncoated) : Apply current at duplex print of Uncoated paper The offset value mentioned in step 5 is for the initial check. After confirming the paper sticking condition, conduct fine tuning. Leave the printed samples on the desk for around 30 to 60 minutes. Do not mix up sets of different setting. Pull the top sheet on the set and check the sticking level. Select the least sticking setting to register a paper profile. Instruct the customer to use the profile.
Note • Do not try the extreme value such as -50 to +50 for the [Offset Value] from the beginning, When the value is changed by the large steps, the setting will be far from the optimum, causing the strong paper sticking. 3. the When the symptom still remains after step2 and the HM-102 is installed, enable humidifier for print.
Weight: 136gsm and over Ty Type: pe: Color paper and coated paper
- 130 -
KONICA MINOLTA MINOLTA Confidenti Confidential al [Paper Setting]→[Change Setting]→[RU Curl Adjustment]→[Humidifier Set.]
To use humidifer for other paper type and weight, change the DIPSW38-4 from "0" to "1"(ON) to release the prohibition. [Service mode]→[System Setting]→[Software DIPSW Setting] DIPSW49-4 Contents 0 Prohibited (Default) 1 Release prohibition
Note • When the humidifier is set to ON for the 135 g/m2 or less color paper and coated paper, conveyance roller wrapping jam may ma y occur due to the re remained mained moisture on the surface of paper. Therefore, be sure to check whether the change of DIPSW is effective. 5. When the tested paper has been exposed in the high temperature and high humidity humidit y environment, check if the symptom changes when the paper just unpacked is used. 6. When the problem remains at the use of off-line finisher even conducting step 5, request customer to manually separate or use the jogger just before setting the paper to the t he offline finisher.
Table of contents contents
- 131 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.3.2. 2.3. 2. Static Sticki ng i n Options Optio ns (1)
Symptom When you use the function of Options, you have encountered Mis-align output/Misalign folding/Mis-alignment as bellow.
(a) Mis-align output
(b) Misalign folding Misalign folding position Correct folding position Stapling position
- 132 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (c) Folding error with Misalignment Correct folding position Stapling position
(2) Cause (a) The Anti-Static Performance is reduced by modification brush. - The current machine correspond to the problem that paper edge becom become e dirty dirty.. By the side-effect of this correspondence, Anti-Static performance has reduced.
(b) Characteristic problem of each machine mechanism - By the difference of toner, Characteristic problem of each machine mechanism become prominent. (3) Solution Exchange to the previous model m odel of Anti-Static Brush - About detail of exchanging procedure, please rrefer efer to TABT1600243*. Caution 1. If you refer to this procedure, please confirm the "Occurrence location" and "conveyance route". And please exchange the Anti-Static Anti-Static brush for conveyance route. 2. If you will installation for Color machine, the paper edge might become dirty as side-effect. Because the previous Anti Static Brush is hard material, the surface of printed toner is shaved by brush. 3. Please confirm the Anti-Static Brush type as bellow before exchanging. excha nging. Brush type The detail of brush Necessity of exchanging
- 133 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Thunder-ron Brush
Need to exchange
SUS Brush
Need not to exchange
3. Correspondence for each options -The Target Target model are as bellow. 1. SD-510 : Refer to TABT1502274* TABT1502274* -About the detail of procedure, please refer to TABT1600243*.
Table of contents
- 134 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
2.4.1. J-16xx (CSRA approach) (1) Symptom J-16xx occurs. (2) Cause There are plural probable causes.
List up the probable causes using the CSRA.
(3 (3)) Solution The CSRA determines the entire state of a machine from the acquired data then displays a list of the probable causes with the solution in the order of higher probability on the PC or mobile screen. Try the solution from the top of the llist. ist. When the he symptom is not solved, go to the next item
1. Press the Administrator Call. *[Setup menu] -> [Administrator settings] -> [System linkage] -> [Administrator Call] Note When J-16xx has occurred, please press the [Administrator Call] button within the same day. Otherwise, the JAM information is not sent to CSRA system because JAM information is cleared from the machine after sending the daily report.
2. Access to the following URL of CSRA(CS Remote Analysis) after 5 minutes. (It tak takes es max. 5 minutes for CSRA system to register data.) https://csra.konicaminolta.jp https://csra.konicaminolta.jp Note *T To o login the CSRA, you need to enter your User ID and Password. For more information, please refer to TNBT1600039 *
- 135 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
PC View
Mobile View
3. Select [Troubleshooting] button.
PC View
Mobile View
4. Select [Sales Office], [Model], [S/No] and [Period] in search items.
PC View
And press [Apply].
Mobile View
- 136 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
5. After checking the date time of the search results, select the trouble that applies from the dropdown list of [Symptom] for troubleshoot and press [Apply].
PC View
Mobile View
6. Check the machine status from fr om top priority items indicated by an arrow and select the applicable state from the drop-down list at the right side. (Cause and solution are displayed in the order of a higher probability.)
PC View
Mobile View
7. Being selected, the next item is displayed. Select the check items in order, check the cause and the countermeasure for the item displayed at the very end and conduct the measure.
- 137 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
PC View
Mobile View
8. Record the result of the tried solution ・Select the result from the drop-down drop-do wn list of [Interaction Item] below. ・Describe the detail of the measure you applied in the [Description] area. ・ After entering, press [Register].
PC View
Table of contents
Mobile View
- 138 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.1.1. 3.1. 1. Long waiting tim e for mi xed media (1) Symptom Print job of mixed media has a long waiting time when changing media. (2) Cause Fusing target temperature depends on paper type/weight.
The wait time to achieve target
temperature for another media also changes according to the setting. (3) Solution 1. Change the setting of [Fusing Stability (Mixed Media)] from Quality ([Best Quality] or [Better Quality]) to [Speed]. If the productivity of [Speed] mode is not in the satisfactory level, change the setting to [Highest Speed]. When changing the setting of [Fusing Stability (Mixed Media)], it is possible to change the range of fusing temperature for the "Ready" condition. Although the waiting time time is shorter when changing the setting of [Fusing Stability (Mixed Media)] from Quality ([Best Quality] or [Better Quality]) to Speed([Speed] or [Highest speed]), the image quality which is related to fusing temperature may be fluctuated. Especially, Especially, it has high possibility that the image quality st on the 1 page is fluctuated. 2. In case of C6100, change the setting for [Speed Setting] from [High/Middle] to [Low]. In case of C1085, change the setting for [Speed Setting] from [High] to [Low]. [Paper Setting]→[Change Set]→[Weight]→[Speed Setting] When the mixed mode including 2 different range of the control table is used, when the speed is reduced for the high temperature control applied paper type (mainly thick paper), the difference between low temperature and high temperature is reduced. By reducing the switch timing, warm-up time is reduced. As temperature difference is small, the image quality inconsistency is not much. Note • When the Process Adj. is not indicated, change the DIPSW1-0 D IPSW1-0 (To (To show process adjustment in the Paper Setting) from "0" to "1" (Show).
- 139 -
KONICA MINOLTA MINOLTA Confidenti Confidential al The recommended setting for this solution is as shown in the below table.
Thin paper 55 to 61 62 to 74 75 to 80 81 to 91 92 to 105
T h i c k p a p e r
106 to 135
136 to 176
55 to 61 62 to 74 75 to 80 81 to 91 92 to 105 106 to 135 136 to 176 177 to 216 217 to 256 257 to 300 301 to 350
Area: Area:
[High/Middle] is recommended for [Speed] [Low] is recommended for [Speed]
Note ・Depending on the paper type, wait time is not shortened. Table of contents
177 to 216
217 to 256
257 to 300
301 to 350
- 140 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.1.2. 3.1. 2. De Dehumi humi dif ying i ndic ation and unable to start pr int (1) Symptom When the dehumidifier heater is installed, the machine indicates dehumidifying de humidifying on operation panel and does not start printing for a while. Dehumidifier: HT-506 (PF-707m/PF-71 (PF-707m/PF-711) 1) (2) Cause Under high humid environment (humidity 56% or more), mor e), to stably feed coated paper from PFU, the printing does not start until the sensor in the tray detects the specific temperature range. Even the temperature reaches to the target once, if the tray is pulled out at the moment, dehumidifying is indicated again. (3) Solution Change the DIPSW 18-4 (Whether to print during dehumidifying heater temperature control is on going) from 0 (restrict) to 1 (allow) By this setting, even the tray temperature is not ready, printing is started. Note • Since the dehumidifying operation is not completed, no feed jam which tends to occur on coated paper under high humidity may increase. • For other than coated paper, no feed jam under high humidity rarely occurs and dehumidifying is not conducted.
contents Table of contents
- 141 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.2.1.. C-3 3.2.1 C-3xx xxx(Fusin x(Fusin g related error err or code) c ode) (1) Symptom C-3XXX (fusing related error codes) occurs Subject error code ・ Main body: Fusing unit set error C-3106 ・ Main body: Fusing unit operation error ・ Main body:
C-3101, 3102, 3104, 3105, 3106, 3108, 3109, 3110 Fusing unit high temperature error C-3501, 3502, 3503, 3504, 3505, 3801, 3802 C-3901, 3902, 3903, 3904, 3905, 3906, 3907, 3908, 3909, 3910 C-3911, C-391 1, 3914, 3915, 3916, 3917, 3919
(2) Cause 2-1. The connection of the fusing drawer connector (at machine rear) is not firm enough, C-3XXX possibly occur)Before confirming each sensor, please check following ・ Screw at fusing drawer connector (at rear) gets loosened ・ The steel plate of the drawer connector (at front) gets malformed. 2-2. Pressing arm scale plate may interfere with the scale plate and the operation failure or wearing occurred.
- 142 -
KONICA MINOLTA MINOLTA Confidenti Confidential al (3) Solution Step 1: Check whether the installation screw for the fusing drawer (at rear) gets malformed.
- 143 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Step 2: Check whether the connection connection of the fusing fusing drawer connector (at (at machine front) becomes insufficient due to malformed steel plate. How to check: While the fusing unit is in the machine, measure the the steel plate for the drawer at ADU mount side and fusing uni side. Confirm if the diffence is within the pper limit, (Upper/Lower should be 20.5+/- 0.5mm)
Fusing drawer(Front)
ADU mount side
Spec : 20.5±0.5mm
Fusing unit side
Status the fusing unit is set
Measure at the bottom 20.5±0.5mm
Measure at the top 20.5±0.5mm
- 144 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Step3. Check the lilife fe count of the the fusing bearing/Lw, the heat insulating sleeve/Lw and the lower pressure roller. Please replace parts if they exceed 1,050,000 counts.(Refer to the Service manual) When you replace parts, apply the grease without fail. Ty Type pe of grease: 00GR0026## Fl Fluotribo uotribo MH MH (Multemp Grease FF-RM) Grease application position: Refer to service manual [Grease application procedure] 1. When you install the heat insulating sleeve/Lw, apply the Fluotribo MH to the shaft of the lower pressure roller. 2. When you install the fusing bearing/Lw,, be sure to apply the Fluotribo MH on the outside the heat insulating sleeve/Lw. (Lower photograph) When you install the fusing gear/1, Apply the Fluotribo MH to the shaft of the lower pressure roller.
The state after applying the Fluotribo MH on the outside the he heat at insulating sleeve/Lw. Apply the circumference uniformly. uniformly.
- 145 -
KONICA MINOLTA MINOLTA Confidenti Confidential al Step4． Apply grease at the contact point between the pressing arm scale plate. Ty Type pe of grease : 00GR0026## Fluotribo Fluotribo MH (Multemp Grease FF-RM) Grease application position : At the top of the pressing arm (as shown in below photo)
After applying the grease, move the pressing arm by hand to spread the grease.
(4 (4)) Replacement Replacement parts setting Following parts parts has been set as spare parts.
p/n・ A5AW7405: Adjusting plate
Table of contents
Please purchase it as needed.
- 146 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.2.2.. C-223 3.2.2 C-2235/ 5/464 4641/ 1/46 4642 42/46 /4643 43 (Densi (Density ty on fr front ont sid side e light li ght er t han back b ack side) (1) Symptom C-2235/4641/4642/4643 (Intermediate transfer steering edge sensor abnormality) occurs continuously and Y/M/C density on front side is lighter than back side. (2) Cause When mounting Intermediate Transfer Unit on Process Unit, a plastic ring (56AA4049) on 1 st Transfer Pressure Cam may be dropped down. Due to that, 1 st transfer pressure mechanism may not be set to correct position.
Plastic Ring (56AA4049) Fig.1 Intermediate Tran. Unit
(3) Solution 1. Apply the intermediate transfer unit in accordance with the t he following procedure. ・Set the intermediate transfer unit with guiding the holding shafts of it by the guide parts on Process Unit( Fig.2: Direction of red arrow) ・When setting the intermediate transfer unit with falling the Unit down to direction of blue arrow, the plastic ring may come off from the unit. Direction to avoid avoid
Direction to avoid avoid
direction Good direction direction Good direction
Guide Part/Rear_Upper
Guide Part/Rear_Lower
Fig.2 Process Unit
- 147 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 2. Make sure not to come com e the plastic ring off after setting s etting the Intermediate Transfer Unit. ・ After setting Intermediate Transfer Unit on Process Unit, pull the stand plate(Fig.3) from unit. Then, check whether there is a plastic ring such as Fig.4.
Plastic Ring
Stand plate
Fig.3 Position of Stand plate contents Table of contents
Fig.4 Equipped condition of Plastic Ring
- 148 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.2.3. C-221 3.2.3. C-2211/2 1/2212 212/221 /2213/2 3/2214 214 (Dru (Drum m mo moto torr err error or)) (1) Symptom While the drum rotates at paper feed and so on, C-2211/2212/2213/2214 occurs. C-2211 (Yellow) C-2212 (Magenta) C-2213 (Cyan)
C-2214 (Black) (2) Cause ･ The friction between the drum and the cleaning blade increased. When following 3 conditions are satisfied, the friction tends to increase and the load applied to the drum motor torque increases. When it exceeds certain llevel, evel, the machine automatically stops. Conditions: High temperature and high humidity, DU life count is small, Low coverage
(3) Solution 1. When the drum motor error occurs, turn OFF then ON the power switch. The friction load between the drum and the cleaning blade often reduces by the power OFF and recovers to normal after turning ON.
2. change When the motorDIPSW error recurs soon after recovery recover y, replace the subject color DU and thedrum following [Service]→[System Setting]→[Software DIPSW Setting] DIPSW 108-7 0 1
Setting Priority to reduce friction1 Priority to reduce friction 2
Contents Create toner patch at the ends of the drum referring to the DU count, coverage and ambient environment (Default) Create toner patch at the ends of the drum referring to the DU count and coverage. (recommended)
Change DIPSW108-7 DIPSW108-7 to 1. It increases frequency to create toner patch at the ends of the drum to reduce friction against the cleaning blade. Side effect: Toner Toner consumption slightly increases (Max around 1.5%) 3. When the steps 1 and 2 does not improve, change the setting for the Background Margin Fine Adj. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj.]
Change the setting value to -5 (recommended) Side effect: Background may appear to the white part. Note: The background may possibly appears at the white part. So, check the image after adjusting the value. If reset the value to 0, conduct Gamma Automatic Adjustment. [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Gamma Automatic Adjustment] contents Table of contents
- 149 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
breaks 3.3.1. Fusing unit frame breaks (1) Symptom The thrust force at the shaft holder of the upper pressure roller increases and the fusing frame breaks.
Damaged fusing frame
Enlarged photo
(2) Cause The grease applied to the circumference of the upper pressure roller heat insulating sleeve is exhausted. When the grease is exhausted, the thrust force increases at the shaft bearing. The pressure given to the frame also increases and the frame gets damaged. In the worst case, the bearing comes off and the damage gets enlarged.
(3) Solution Check the upper pressure roller, fusing bearing/2, and the Heat Insulating Sleeve/Lw count. If the counts exceeds, 1,050,000 counts, replace them. (Refer to the service manual) Be sure to apply the grease at the replacement. Maintenance cyc le Maintenance Unit class: Fusing unit Subject parts: A5AW7201 A5A W7201 Upper Pressure Roller
A5A A5AW7452 W7452 Fusing Bearing/2 A5AW7217 A5A W7217 Heat Insulating Sleeve/Lw
Maintenance cycle:
1,050,000
Grease to apply: 00GR0026## Fluotribo MH (Multemp Grease Gr ease FF-RM)
- 150 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Lubrication cycle: 1,050,000 Lubrication location (See the Service Manual) 1. When installing the heat insulating sleeve/2 [1] [1],, apply the Multemp Grease FF-RM to the shaft of the upper pressure roller [2]. 2. When installing the shaft bearing/2, apply the Multemp Grease FF-RM to the outside of the Heat Heat insulating sleeve/2 [1].
*T To o bring attention of the CE, C E, the warning sheet is enclosed in i n the Heat insulating Sleeve/2 (p/n A5AW7217 ) to prevent the damage.
- 151 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
(4 (4)) Replacement Replacement parts setting Following parts parts has been set as spare parts. A5AWR744 A5A WR744 Fusing Main Body/Upper Assy
Table of contents
Please purchase it as needed.
- 152 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
3.3.2. 3.3. 2. Una Unable ble to pull pu ll out o ut th e process mou nt (1) Symptom Though pulling the lever on the process mount, it cannot be pulled out.
Front view (2) Probable causes 1. Main body levelling is insufficient. 2. The fixing screw for the intermediate transfer unit was fixed in at wrong step. (3) Solution 1. The inclement of the machine front-rear/right-left should be 1/100 or less. (Refer to the Installation manual.) 3. Fix the intermediate transfer unit fixing screw in the following order. 3-1. While the process unit is pulled out, set the fixing material and fix by the screw. 3-2. Push in the process unit to the main body to return to the original position.. 3-3. Fix A arrowed and B arrowed fixing screws. Fix them after returning the process unit to the original position. If they are fixed while the process unit is pulled out, the intermediate transfer unit position is decided before the process unit position is decided. This may cause the difference of the phase between the intermediate intermediate transfer unit and the drive shaft. Consequently, Consequently,
Table of contents
- 153 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.1. 4.1. 1. Cla Clamp mp door d oor open/clos open/close e issue issu e (1) Symptom The clamp door does not close perfectly or does not open. (2) Cause If the clamp door is slammed or repeatedly closed without holding the handle, the locking position is dislocated. (3) Solution Correct the attaching position of the locking section so that “A” size can come to the standard range. - A size adjustment standard: 5±0.5mm
(4) (a) (b) (c)
Procedures Remove the screw cap and the four screws to remove the upper outer cover. cover. Remove the cover. (M4 screw x4, M3 screw x2) Loosen the five screws with red paint and shift the lock section lleft eft and right to adjust the position based on the guide line.
-A size can make larger if moving the lock material’s attaching position to the right. (a) Upper outer cover
(b) Cover
Guide line
contents Table of contents
- 154 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.2. 4.1. 2. Entrance conveyance conv eyance section JAM (wavy cur l p ape aper) r) (1) Symptom Jam at the entrance conveyance section. Damage to paper at the trail edge in the feed direction. (2) Cause
Jam occurs when curled or waved paper is caught at the notch at the jam release door of the entrance conveyance section, or the paper trail edge (lead edge when entering the reversal section) is damaged on exiting.
A
Wavy curl paper
Where hooked
Detail drawing viewing from A
(3) Set Solution the paper so that the curli curling ng direction goes inward (Concave at the SD-513 entrance: edge coming the opposite side of the jam release door).
Concave curl
Paper
Table of contents contents
- 155 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.3. 4.1. 3. Book let edge soil age (machine (machine fr ont side) (1) Symptom Booklet edge is soiled. (machine front side)
(2) Cause When stacking the sheets of paper, toner on the preceding paper’s outer fold line is scratched by the lead edge of the next paper and that soils the finished booklet at the machine front side. This only occurs when image is on the outside of the fold line.
(3) Solution (a) Using “Center Erase” to avoid image from being being printed at the fold line. ・[COPY] → [Application] → [FrameCenterErase] → [Center Erase] → Input 1 to 2 mm.
Center Erase 0mm
Center Erase 1mm
Center Erase 2mm
・In case of the printer driver, use the “Center blank area” function.
Note: There is a blank area on the folding section on center page and on the cover. (b) Having prepared original data with imposition, release the “booklet” setting and do saddlestitching.
contents Table of contents
- 156 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.4. 4.1. 4. 44-stit stit ch bookl b ookl et fold line brea br eak k at tr ail edge (1) Symptom When creating 4-stitch thin booklet or using thin papers, the fold line breaks at the trail edge.
(2) Cause When the booklet holding presses a booklet while paper is still on the conveyance guide/Lw or the lift-up block, the booklet trail edge is touched and rubbed against the slant surface, and the fold line breaks.
Booklet holding
The lift-up block
The lift-up block Conveyance guide/Lw
This tends to be occur when the distance between the staple position and the booklet trail edge is: “A:
97 to 100mm” and “B:
19 to 23mm”
Booklet edge
B A (3) Solution Conduct the staple center adjustment and the staple pitch adjustment. ・With A3 paper, adjust the staple pitch adjustment value to the plus side. ・With 11x17 paper, paper, adjust the staple pitch adjustment value to the minus side.
contents Table of contents
- 157 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.5. 4.1. 5. How to calculate Fore-edge Fore-edge trimm ing adjustm ent value (1) Symptom In small-lot trimming mode, the booklet’s finishing size fails to become what is expected. (2) Cause Small-lot trimming adjustment value being input is not appropriate. (3) Solution Input a correct Fore-edge correct Fore-edge trimming adjustment value value calculated calculated with the following formula. Get a target value by making fine adjustments confirming actual feeding test results.
(a) When getting Fore-edge trimming adjustment values from the booklet finished size. 1. Trimming amount = (Cover FD length /2) -5) – Booklet finished size Cover FD length: When it isn't cover insert mode, the most outside paper is "cover" [ - 5 ]: When the trim amount is 5mm or less, the operation error possibly occurs. Therefore, standard setting is [Trimming value + 5mm]. 2. Adjustment value = value = Trimming amount x amount x 10 [ x 10 ]: Convert the trimming amount into operation panel input value. (Trimming amount 1 mm = 10 steps) 3. Fore-edge trimming adjustment value to value to subject machines =justment valueInput Adjustment value + + Default Default adjustment ad value: value valueadjustment at machinevalue installation installation (value on the label at the bottom of the front console) →This value corrects machine variance. (“0” for design value)
-5
Small-lot trimming adjustment value
Front cover FD length Booklet finished size
Trimming position Calculation sample Trimming SRA3 paper (FD length 450mm) into the 210mm booklet. (Default adjustment value is [30].) Trimming adjustment value = 30+ ((((450/2) -5) -210) x10) = 130 →Input [+130] as trimming adjustment trimming adjustment value. (b) When getting fore-edge trimming adjustment value from f rom the cover edge trimming amount. amount = = Cover edge trimming amount -5 1. Trimming amount Cover edge trimming amount amount:: When it isn't cover insert mode, the most outside paper is "cover" [ - 5 ]: When the trim amount is 5mm or less, the operation error possibly occurs. Therefore, standard setting is [Trimming value + 5mm]. 2. Adjustment value = value = Trimming amount x amount x 10 [ x 10 ]: Convert the trimming amount into operation panel input value. (Trimming amount 1 mm = 10 steps) 3. Fore-edge trimming adjustment value to value to subject machines
value + + Default adjustment value = Adjustment value Default ad adjustment justment value: Input value value at machine installation (value on the label at the bottom of the front console)
- 158 -
KONICA MINOLTA MINOLTA Confidenti Confidential al →This value corrects machine variance. (“0” for design value)
Calculation sample Trimming the cover edge by 7mm. (Default adjustment value is [30].) Trimming adjustment value = 30+ ((7-5) x 10) =50 →Input [+50] as the the ttrimming rimming adjustment value. value. Caution There are differences between calculations and finished products depending on what paper types are used and how many booklets are produced. Make sure checking the finished product using an actually printed sample, and make a fine-tuning if necessary. contents Table of contents
- 159 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.1.6. Fore-edge trimming section (corner) paper torn-up / cutting shortage (1) Symptom Booklet’s Fore-edge trimming section (corners) is torn off, or leaves cutting shortage of paper.
(2) Cause
When a booklet is pressed as being twisted due to curls, the booklet does not pile up aligned. If trimmed in this state, papers are bent and escape, leaving scraps of paper. The more distortion amount goes in the plus direction, the more likely to cause torn-off or scraps.
Trim cutter
Trimming position Trimmer receiver Torsion amount (plus direction) (3) Solution Correct the twisting of booklets with the following measures. (a) Change the paper set direction (b) Curl Adjustments (c) Fold Skew Adjustment
Table of contents contents
- 160 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.2.1 4.2. 1 Slit Slit ter JAM/SC JAM/SC caused caused by in put tin ting g wrong wr ong Cust om size (1) Symptom When using Custom size paper on o n the system including TU-503, if wrong sizes are input to the tray, jam (J7571/J7563 etc.) occurs at the slitter section and can possibly end up with SC(C1276/C1277 etc.).
Fig1 Slit cutter Assy (2) Problem cases Slit mode ・ Wrong finished size ・ The actual paper size larger than the input i nput value, the outside of the slit cutter Assy and
paper may interfere with each other and cause JAM (J7571 etc.). ・ If the paper size is small, it hangs down inside the guide section and causes JAM (J7571/J7563 (J7571/J756 3 etc.). ・ At At initializing after jam, if jammed jammed papers distu disturb rb the slit cutter Assy from moving moving to the home position, C1276 (Rare Assy) or C1277 (Front Assy) may occur. ・ If the slit width is thin (less than 8mm), the slit scraps are clogged inside the A Assy ssy filling in the guide section and cause J7571. If clogged scraps are not completely removed, frequent J7571 is the result. In this case TU-503 needs to be detached from SD-513 to remove slit scraps. Non-slit mode ・ Paper is slitten and exited. ・ The difference between the actual paper width and input size causes problems described
in above cases. (3) Papers Cause pass through the slitter section as the edges gripped and conveyed by the guide section of the slit cutter Assy (Fig1) in both slit mode (Fig2) and non-slit mode (Fig3). The slit cutter Assy makes the positioning according to the main body’s paper size setting. The standard sizes are automatically set, but since custom sizes are manually set, if wrong value is input, the slit cutter Assy also makes wrong positioning and cause problems. (Custom size paper can be fed even though an input size is different from an actual size.)
Fig2 Slit mode
- 161 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
Fig3 Non-slit mode
(4) Solution 1. Be careful not to input i nput wrong size for custom paper. Do not mixed up the width from f rom the length when inputting custom size.
2. Centering detection function of main body The centering detection and the centering detection JAM being valid, the machine can hold its operation by causing jams before paper reaching the slitter. However, since the centering detection can possibly make error detection depending on what colors are used on image, discuss with customers before making if normally work. (There is also a possibility that JAM occurs frequently)
Table of contents contents
- 162 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.2.2. 4.2. 2. How to clear slit ter scr ap JAM (1) Symptom Slitter-related jams repeatedly occur after jams* where scraps of paper remain at the slitter section. * J7571/J7570/J7566/J7563/J7573 (2) Cause
-With scrap conveyance failure, scraps of paper remain at the dust guide plate. -Jammed papers are not completely removed and remain inside the slitter unit. (3) Solution How to remove remaining scraps of paper. 1． Unload the slitter unit. 2． Make sure that no scraps remained at the slitter unit upstream.
3．
Make sure that no scraps remained at the slitter unit downstream. If scraps are getting inside the t he slitter, remove them using tweezers, watch out for the slit cutter.
・ ・
The rotary cutter section: Detach the rotary cutter Assy and remove scraps. (Refer to manual.) The slitter section: Detach the guide plate and remove scraps.
- 163 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
How to remove remaining scraps of paper. The back side guide board Note 1 The screws of the blue circle is removed and the green parts are
The front side guide board
removed. *Do not remove the red-painted screws. 2 The screws of the blue circle is removed and the green parts are removed. *Do not remove the red-painted screws.
3
Remove scraps, watch out for the slit cutter. *Do not remove the red-painted screws.
Caution • Do not remove the red-painted screws. • If scraps are getting inside the slitter, remove them using tweezers, watch out for the slit cutter.
Table of contents contents
- 164 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.3.1. 4.3. 1. Book let si de soil age at at clamping c lamping (1) Symptom The booklet’s side part is soiled with toner when clamping on the TU-504. (2) Cause When clamping, image toner on clamped part is transferred to the clamp press surface and soiled
the clamp part of the next booklet. This is likely to occur with high coverage image or poor fusing paper.
(3) Solution (a) Improve the fusing ability. (b) Clean the clamp surface using either of the following methods. -Feed more than two copies of the five sheets of white cover with wider paper than the previous job. -Clean the clamp surface with alcohol etc.
contents Table of contents
- 165 -
KONICA MINOLTA MINOLTA Confidenti Confidential al
4.4.1.. IQ-501 4.4.1 IQ-501 Spot Spot was detect detected.. ed.. message r emains (1) Symptom Though performing the cleaning with the cleaning tool, the dust detection message does not disappear. (For the cleaning with the cleaning tool, see the service manual) (2) Cause The dust attaches inside the scanner glass and the cleaning is not effective.
Dust inside the glass
Scanner glass
Scanner glass 3 Solution
1. Check the scanner dust detection message. ・Spot was detected by inline scanner1: The dust on the Scanner unit/1 glass was detected ・Spot was detected by inline scanner2: The dust on the Scanner unit/2 glass was detected. ・Spot was detected by inline scanner1/2: The dust on the Scanner unit/1 and 2 were detected. 2. Remove the rear cover
・Remove the 10 pcs of the screw scr ew [1] and the
rear cover[2].
- 166 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 3. Pull out the conveyance mount straightly to front Photo: Rear view with the conveyance mount pulled out state Scanner unit/1
Scanner unit/2
4. Remove the glass holding material for the respective scanner to clean. Photo : Rear view of the Scanner unit/2 • Remove 2 pcs of screw [3] and glass hold material [4]. Note Remove the glass hold material at rear only only.. [4] Glass hold material
[3] Screw
- 167 -
KONICA MINOLTA MINOLTA Confidenti Confidential al 5. From the opening of the unit, clean inside the glass by the optics blower. ・From the opening, [5], clean with the optics blower
(a few times)
[5] Opening
Notes: ・ When using the blower brush, remove the brush part from the blower. Otherwise, the hair of the brush may enters inside and causes problem. ・ Use clean blower. Do not use the toner or other dusty blower.
Note ・ Conduct the work only when the "Spot was detected" is not cleared after cleaning with the tool. Otherwise, another dust may enter the scanner. It may be difficult difficult to remove. (KMI cannot guarantee the scanner unit quality) ・ If the message cannot be cleared cleared after cleaning with optics blower blower,, replace the subject scanner unit.
Table of contents
View more...
Comments
