APORTADO POR:
LCD Television Repair Guide Handbook
General
1. ‘13 LCD TV layout structure Overview
JUAN CARLOS RODRIGUEZ
Driver Board Power Board
Main Board
Woofer Speaker
Local Key
T con Board
WiFi Board
IR
RF Board
1
Repair Method by Symptoms
3-1. No Power Check(Flow Chart)
☞Page 5
☞Page 6~7
Check Front Display LED light Status
Power LED On?
- Stand-By: Red light or Turn Off - Power on Condition: Turn Off
“DC Power on” by pressing Power Key with Remote controller
Y
Operation OK?
N
Measure voltage “Power On” line with Tester
Voltage OK? N (3.3V)
Replace Power B/D
Y
N
Check Power cord was inserted properly
Replace Main B/D Y Measure voltage for each output of Power B/D Voltage OK? (3.5V)
inserted properly OK?
Y
N N Voltage OK? (12V,3.5V)
※ Check ST-BY 3.5V Measure votage 3.5V pin with Tester
Close
Y
Replace Main B/D
N
☞Page 6~7 Replace Power B/D
-DC Power on: Switch on the TV with local key or remote controller -AC Power on: Switch on the TV with power supply(outlet)
Replace Power B/D
Output
Voltage Variable range
3.5V 3.325V~3.675V (ST-BY) 12V 11.4~12.6V 24V 21.6V~27V 2
Repair Method by Symptoms Direct LED Power Board
3-2. No Power Check(check method) 1. 2. 3. 4.
Power Sequence : AC IN→ST-BY3.5V→P-ON→12V,24V→INV ON ST-BY3.5V: Power Board → Main Board Micom IC/Power LED /IR Voltage 24V: Power Board → Main Board Sound IC /LED Driver Voltage 12V: Power Board → Main Board /Module Voltage Check the ST-BY(3.5V) and Power on(3.3V)
JC
24 Pin (Power Board ↔ Main Board)
3.3V
Edge LED Power Board
JCR
3.5V
1
Power on(3.3V)
2
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
ST-BY (3.5V)
10
ST-BY (3.5V)
11
ST-BY (3.5V)
12
ST-BY (3.5V)
13
GND
14
GND
15
GND
16
GND
17
12V
18
Inverter On/off
19
12V
20
Lamp : A-Dim LED : N.C
21
12V
22
PWM Dim #1
24
Error-out
23
N.C • Lamp SCANNING Model: PWM Dim #2
The “LED” refers only to the type of lighting source used to illuminate the LCD pixels in the television 1. Direct LED: Direct type term refers to televisions that use a full panel of LEDs to illuminate the pixels. 2. Edge LED: Edge LED,means the LEDs that illuminate the pixels are located only on the edges of the set.
3
Repair Method by Symptoms
3-2. No Power Check(Check method) 24 Pin (Power Board ↔ Main Board)
`13 Model LA Series
Direct LED Power Board
3.3V
JCR Edge LED Power Board
3.5V
1
Power on(3.3V)
2
Inverter On/off(3.3V)
3
ST-BY(3.5V)
4
PWM Dim #1
5
ST-BY(3.5V)
6
PWM Dim #2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
24V
17
GND
18
GND
19
GND
20
GND
21
GND
22
L/DIMO_VS
23
L/DIM0_MOSI 24 L/DIM0_SCLK 18 Pin (Power Board ↔ Main Board)
1
Power on(3.3V)
2
Inverter On/off
3
ST-BY(3.5V)
4
PWM Dim #1
5
ST-BY(3.5V)
6
PWM Dim #2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
24V
17
GND
18
GND
4
Repair Method by Symptoms
3-3. No Power Check(Power Pin Description)
Pin No.
Items
Description of service and functions
24
ERROR
23
NC
22
P-DIM
The CPU automatically adjusts the brightness, based on the wave pattern of elements communicated (for each picture mode)
20
A-DIM
The CPU customizes the brightness of Lamp as to each different brightness of picture (a serial current wave)
18
INV ON/OFF
17,19,21
12V
15,16
GND
13,14
GND
11,12
3.5V
ST-BY
9,10
3.5V
ST-BY
7,8
GND
5,6
GND
2,3,4
24V
1
Power On
The Inverter or HV signals whether the Lamp Turn-on functions normally Null terminals
Signals for Inverter, controlled by MICOM Power Supply to Main Board/Module
Sound IC B+ Voltage A Voltage required to turn Multi Voltages ON, Input by MICOM(Voltage: 3.3V) 5
Repair Method by Symptoms
4-1. No Picture Check(Flow Chart)
Case1. No Picture with audio working condition Case2. No Picture with audio not working condition First of all, Check whether all of cables between board are inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable,,,) ☞Page 10~12 No Picture Case 1
Sound Working properly
Check Back Light whether “On ”or off with naked eye
Y
N
Back light “On”
Y
Check Power Board 12V, 3.5V line
Check Voltage 12V, 3.5V
N
Y
Replace module
N
Check Power Board 24v output No Picture with Sound not working conditon
Repair Power Board or parts
Case 2 Voltage OK?
Y
Replace Inverter or module End
N Repair Power Board or parts
☞Page 10~12 Check Power Board 3.5V,12V,24 line
Voltage OK? N Replace Power Board
Y
Check and replace MAIN B/D
Output End
Voltage Variable range
3.5V 3.325V~3.675V (ST-BY) 12V 11.4~12.6V 24V 21.6V~27V 6
Repair Method by Symptoms
4-2. No Picture Check(Check Power Pin) Screen (LK, LW)
JUAN CARLOS RODRIGUEZ
Check the DC 24V, 12V, 3.5V 24 Pin (Power Board ↔ Main Board) - 공통
NC 12V 12V 12V GND GND 3.5V 3.5V GND GND 24V ON/OFF
ERROR P-DIM A-DIM INVON GND GND 3.5V 3.5V GND GND 24V 24V
1
Power on(3.3V)
2
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
ST-BY(3.5V)
10
ST-BY(3.5V)
11
ST-BY(3.5V)
12
ST-BY(3.5V)
13
GND
14
GND
15
GND
16
GND
17
12V
18
Inverter On/off
19
12V
20
A-Dim
21
12V
22
PWM Dim
23
N.C (only Lamp SCANNING Model : PWM Dim #2)
24
Error-out
7
Repair Method by Symptoms
4-2. No Picture Check(Check Power Pin) Screen (LM)
Check the DC 24V, 12V, 3.5V
Direct LED Power Board
24 Pin (Power Board ↔ Main Board) - 공통
24V
JCR
3.5V
1
Power on(3.3V)
2
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
ST-BY(3.5V)
10
ST-BY(3.5V)
11
ST-BY(3.5V)
12
ST-BY(3.5V)
13
GND
14
GND
15
GND
16
N.C (Only LPB : V-sync)
17
12V
18
Inverter On/off
19
12V
20
N.C (LPB, Lamp : A-dim)
21
12V
22
PWM Dim #1
23
N.C (only Lamp SCANNING Model : PWM Dim #2)
24
Error-out
12V 8
Repair Method by Symptoms
4-2. No Picture Check(Check Power Pin) Screen (LA)
JUAN CARLOS RODRIGUEZ Check the DC 24V, 12V, 3.5V Direct LED Power Board
18 Pin (Power Board ↔ Main Board)
24 Pin (Power Board ↔ Main Board) 1
Power on
2
Inverter On/off
1
Power on
2
Inverter On/off
3
3.5V
4
PWM Dim #1
3
3.5V
4
PWM Dim #1
5
3.5V
6
PWM Dim #2
5
3.5V
6
PWM Dim #2
7
GND
8
GND
7
GND
8
GND
9
24V
10
24V
9
24V
10
24V
11
GND
12
GND
11
GND
12
GND
13
12V
14
12V
13
12V
14
12V
15
12V
16
24V
15
12V
16
24V
17
GND
18
GND
17
GND
18
GND
19
GND
20
GND
21
GND
22
L/DIMO_VS
23
L/DIM0_MOSI
24
L/DIM0_SCLK
9
Repair Method by Symptoms
4-3. No Picture Check(Check LED Driver 24V )
Check the DC 24V and Inverter on Direct LED Power Board
Edge LED Power Board
P202
P203
1~5
24V
1~5
12V
6~10
GND
6~10
GND
11
Error
12
Inverter ON( 3.3V)
13
A-dim
14
P-dim
10
Repair Method by Symptoms
5-1. No Sount Check(Flow Chart)
☞Page 15~16 No sound
Check User menu speaker off
Speaker Off
N
Check Voltage (24V)
Check audio B+ 24V of Power Board
Y
N
Replace Power Board
Cancel OFF
Check Speaker Cable Disconnection
Y
N Disconnection
Replace main Board
End
Y
Replace Speaker
11
Repair Method by Symptoms
5-2. No Sount Check(Troubleshooting) ‘13 LA Series
Main Board Power Board
②
24 Pin (Power Board ↔ Main Board) Power on INV ON 1 2 3.5V PDIM#1 3 4 3.5V PDIM#2 5 6 GND GND 7 8 24V 24V 9 10 GND GND 11 12 12V 13 12V 14 24V 15 12V 16 GND 17 GND 18
①
JUAN CARLOS RODRIGUEZ
Checking method(direction) when there is no sound
① Check the contact condition of or 24V connector of Main Board ② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, check the connector)
12
Repair Method by Symptoms
6. Picture Error Check(Flow Chart)
Vertical/Horizontal bar, residual image, light spot
6. Picture Error
Board Check method Replace Module
Check color condition by input -External Input -Component -RGB -HDMI/DVI
☞Page 62
☞ Page 31 Screen OK? N Replace module
Y
Check external device connection condition
Y Good? N Request repair for external device
Check and replace Link Cable
N Screen OK? Y End
N
Replace Main B/D
Screen OK? Y End
Check Test pattern
13
Repair Method by Symptoms Category
Main B/D
Main B/D
Main B/D
Main B/D
Items
IC
IC
IC
IC
Failure
Picture distortion
Picture distortion
Picture distortion
Picture distortion
7-1. Sysmptoms List(Main Board) Cause
Conditions
Failure in I2C communication between MICOM and Main IC
Picture occasionally cracked by the soldering on Main IC
Picture cracking due to poor soldering on Main IC
R-color noise caused by poor soldering on Main IC
14
Repair Method by Symptoms Category
Main B/D
Main B/D
Main B/D
Main B/D
Items
IC
IC
Failure
Picture distortion
Picture distortion
IC
Static screen
IC
No sound
7-1. Sysmptoms List(Main Board) Cause
Conditions
Mosaics generated from poor inside Main IC
Picture cracking from poor service of an element inside Main IC
Screen frozen from a poor feature in Main IC
No sound due to a poor feature in Audio IC
15
Repair Method by Symptoms
7-1. Sysmptoms List(Main Board)
Category
Items
Failure
Speaker
Poor
Noise in
Cable
processing
sound
Speaker
Poor
Noise in
System
processing
sound
Speaker
Poor
Noise in
System
processing
sound
of alien materials into Speaker System
Picture
Picture cracking around the contour from
FFC Cable
Poor contact
cracking
Cause
Conditions
A “woong ~” sound from the right Speaker caused by a speared damage in Sound Cable
A noise and vibration produced from influx of alien materials into Speaker System
A noise and vibration produced from influx
poor contact between FFC Cable PINs
16
Repair Method by Symptoms Category
Items
Failure
Module
Panel
Vertical bars
Module
Panel
Vertical bars
Module
Panel
Vertical bars
Module
Panel
Dark screen
7-2. Sysmptoms List(Module) Cause
Conditions
Vertical bars caused by a irregular feature in the Panel
Vertical bars caused by a irregular feature in the Panel
Vertical bars caused by a irregular feature in the Panel
Screen getting partially dark by a defect inside the Panel
17
Repair Method by Symptoms Category
Items
Failure
7-2. Sysmptoms List(Module) Cause
Conditions
Screen getting partially dark by a failure in Module Driver B/D
Dark screen MODULE DRIVER B/D
Module
Vertical bars
Panel
Vertical bars caused by a poor feature in the Panel
1/3 part of Screen (left/center/right) getting 1/3 part of dark due to a defective feature in Driver Module Driver B/D Screen getting B/D dark
Influx of alien materials into the Module Module
Panel
Alien materials during the assembling process
18
Repair Method by Symptoms Category
Module
Items
Failure
7-2. Sysmptoms List(Module) Cause
Conditions
Connector 1/2 of Picture Picture cracking from contamination by s
cracking
Module
Panel
Dark screen
Module
Panel
Vertical bars
Module
Panel
Vertical bars
foreign materials inside a connector
Screen getting dark from a defect in LED unit inside the Panel
Vertical bars caused by a defective feature in the Panel
Vertical bars caused by a defective feature in the Panel
19
Repair Method by Symptoms Category
Items
Module
Panel
Module
Panel
Module
Panel
Processi ng failure
Processing failure
Failure
7-2. Sysmptoms List(Module) Cause
Conditions
Screen partially Screen partially getting too bright from a too bright failure in LED inside the Panel
Alien materials inside
Moisture inflow into the product
Film separation Film separation from defective processing
Shipment With the Shipment setting inapplicable, setting failure Shipment is made only in a control mode
20
Repair Method by Symptoms Category
T-Con B/D
T-Con B/D
T-Con B/D
T-Con B/D
Items
EOS
EOS
EOS
IC
Failure
Vertical bars evenly spaced
Vertical bars evenly spaced
Picture distortion
Picture distortion
7-2. Sysmptoms List(Module) Cause
Conditions
Damage in Electrical Over Stress
Damage in Electrical Over Stress
Poor features in T-CON
Picture cracking from a poor feature in T-CON IC
21
Repair Method by Symptoms Category
T-Con B/D
T-Con B/D
T-Con B/D
T-Con B/D
Items
IC
IC
IC
IC
7-2. Sysmptoms List(Module)
Failure
Cause
Picture
Picture cracking from a poor feature in 3D
distortion
Picture distortion
Picture distortion
Picture distortion
Conditions
Formatter IC
Picture cracking from contamination around 3D Formatter IC
Picture cracking from an error in Boot Data
Picture cracking from an error in Boot Data
22
Repair Method by Symptoms Category
T-Con B/D
T-Con B/D
Items
IC
IC
7-2. Sysmptoms List(Module)
Failure
Cause
Picture
Picture cracking due to desquamation of
distortion
Picture distortion
Conditions
FRC IC
Picture cracking due to desquamation of FRC IC
23
Repair Method by Symptoms
7-3. Sysmptoms List(LVDS Cable)
Category
Items
Failure
Cause
LVDS
Poor
Picture
Picture cracking along the contour from
Cable
contact
distortion
poor contact between LVDS Cable PINs
LVDS
Poor
Picture
Cable
contact
distortion
LVDS
Poor
Picture
Picture cracking along the contour from
Cable
contact
distortion
poor contact between LVDS Cable PINs
Conditions
Picture cracking from poor contact between LVDS Cable PINs
24
Repair Method by Symptoms Category
Items
Failure
FFC
Poor
Picture
Cable
contact
distortion
7-3. Sysmptoms List(FFC Cable, Cabinet, etc) Cause
Conditions
Picture cracking along the contour caused by poor contact between FFC Cable Pins
Processi Processing Shipment With the Shipment setting inapplicable, ng failure failure setting failure Shipment is made only in a control mode
Cabinet
Cabinet
ICM Filter
Desquamation Some space made Inside from tear-off of of ICM Filter ICM Filter caused by a external shock
Vibration and Speakers shaking from some damage in Damage noise in the Cabinet Speaker Boss Speaker System
25
Repair Method by Parts
Mosaic Patterns
8. Main Board Check (Symptoms)
Picture Distortion
Picture Smear 26
Repair Method by Parts
8. Main Board Check (One-Point Repair)
1. Symptoms : Screen color smearing intermittently 2. Cause of failure : Link cable contact fault
JCR
1. Check RGB pattern with ‘ADJ Key through SVC Remote 2. Link cable by gently tapping the contact area on the symptoms of hand Checked 3. Link cable disassembly and re-assemble 4. Check whether the screen display is normal.
Color smearing
27
Repair Method by Parts
8. Main Board Check (One-Point Repair)
1. Symptoms : Auto Power On/Off 2. Cause of failure : Main board failure
1.Press Button ‘In-Start Mode’ Key 2.Enter ‘Power Off Status’
1.If there are “POWER_OFF_BY_NO_ POLLING” message 2. Replace the main board 3. Check the condition of Screen *POWER_OFF_BY_NO_POLLING :If there are no communications between micom and Host CPU for 15second → Micom will reboot all system
28
Repair Method by Parts
9. Module Check(One Point Repair)
1.Title: No Display (Only BackLight or multiple vertical bars) - Sound Normal/CH Volume Control Normally 2. Applied to: LK, LW57, and 65 3. Troubleshooting: As shown below, inspect the P-VCC(12V) B/D inside T-CON and US1 output voltage.
* P-VCC: A standard voltage to activate the LCD VCC: Usually 3.3V power required to activate Digital IC VDD: A voltage supplied to Source Drive IC for activation of LCD VGL/VGH: Voltages required to turn TFT Gate on/off -VGL: TFT Gate on -VGH: TFT Gate off
Upon an abnormal voltage, open and re-check the FFC leading from T-CON to the Module. Upon recurrence of a same failure, change T-CON or the Module if the voltage is normal. (Refer to below Normal Voltage)
T-Con Board
P VCC
JCR
VDD VCC VGL VGH
PANEL VCC : F1 or C1(12V) VDD : C239 (16V)
A failure condition
JCRL
VCC : C215 (3.3V)
VGL : C251 (-6V)
VGH : R271 (28V)
Output voltage of US1 29
J.CARLOS RODRIGUEZ
Repair Method by Parts 1.Title: No Display (Only BackLight)
9. Module Check(One Point Repair)
* P-VCC: A standard voltage to activate the LCD VCC: Usually 3.3V power required to activate Digital IC VDD: A voltage supplied to Source Drive IC for activation of LCD VGL/VGH: Voltages required to turn TFT Gate on/off -VGL: TFT Gate on -VGH:TFT Gate off
- Sound Normal/CH Volume Control Normally 2.Applied to: LW9500, LW9600, andLW9800 3. Troubleshooting:
Check if Back Light is ON and, if it’s ON, re-check T-CON as the following sequence. Change the Module if the voltage is normal. Change T-CON if voltage abnormal.
T-Con Board
T-Con Board VDD
P701
VCC P VCC
VGH
VG L
No picture (Only backlight)
A failure condition
P VCC : P701 48~51 PIN (12V)
Input voltage of LVDS
VCC : D403 (3.3 V) VGH : D400 (27V)
VDD : D402 (16V) VGL : C450 (-5V)
Output voltage of IC 401 output
30
Repair Method by Parts
10-1. Wi-Fi Check(Flow Chart)
Wi-Fi operating error
9. Wi-Fi Operating Checking(Flow Chart)
☞Page 34
Check the INSTART menu
Wi-Fi Mac value is “NG”?
N
Check the Wifi wafer Pin no.1
Normal Voltage 3.3V
Replace Main B/D
N
Y
Y Check & Repair Wifi cable connection
Close
Pin map Wi-Fi Mac value is “NG”?
Y Change the Wifi assy
N
Close
PIN
USB interface
1
Vcc(3.3V)
2
DM
3
DP
4
GND
5
WOW
6
NC 31
Repair Method by Parts
10-2. Wi-Fi Check(One Point Repair)
1. Symptoms : Wi-Fi disconnection 2. Cause of failure : Caused by bad Wi-Fi Module
1. Check the Wi-Fi Version at INSTART menu - Wi-Fi MAC and IP Address to check an abnormal Inspection
1. Wi-Fi Module replacement 2. Check the wi-fi Version at INSTART menu - Wi-Fi MAC and IP Address normal check connections from main to Wi-Fi module
32
Repair Method by Parts
11. Camera Check(Flow Chart/Troubleshooting)
10. Camera Operating Checking(Flow Chart) Camera Operating Error Check the INSTART menu
Camera Ver. is “NG”?
N
Check the Camera wafer P4200 (pin no.2)
Y
N
Replace Main B/D
Y
Close
Check & Repair Camera cable connection
Camera Ver. is “NG”?
Check Voltage (3.3V)
N
Close
Y
Change the Camera assy
33
Repair Method by Parts
Check the INSTART menu
RF Receiver ver is “00.00”?
N
12-1. Magic Remote Check(Flow Chart)
Check M-Remote itself Operation
Y
Press the ‘wheel’
N
Replace RF assy Cable
* INSTART MENU15.RF Remocon Test3. Firmware download
Close
Press the wheel
Close
Check & Replace Batterry of M-Remote
☞Page 50
Y Down load the Firmware
Turn off/on the set
Is it shown ‘ok’ N message?
Y
N
Y
Check RF assy connection
Normal Operating?
Normal Operating?
Y
Close
Press the ‘back’ and ‘home’ key at the same time about 5sec
N
Is it shown ‘ok’ message?
Y N Close Replace M4
Close
34
Repair Method by Parts
12-2. Magic Remote Check(Pairing/Un Pairing)
RF Pairing/Un-Pairing Method Method
RF Pairing
1. Method 1 - If un-paired, just press "OK"button. - If paired, press "OK" button after un-pairing. 2. Method 2(Repairing) - Press "BACK"button for 5 sec.
Depending on Magic remote Press "HOME/SMART" button and "BACK" RF button at the same time for 5sec. Un-Pairing R/C LED blinks 3times after a few sec's. Then un-paired. To re-pair Press OK button.
Description ▶When pairing, the remote should make a pairing request IR signal to TV. ▶When TV receive the IR signal, it should send “ pairing request packed" to the RF receiver. ▶ After pairing success, the remote LED should blink for some time and TV sends "pairing success pack" back to TV. ▶When remote try's to un-pair, it doesn't care about state of receiver(stand alone).
▶When remote try's to un-pair, it doesn't care about state of receiver(stand alone). ▶After un-pairing, all pairing information should be erased. ▶After un-pairing, LED should blink 3times. ▶The remote just becomes active only in IR mode control function.
35
Repair Method by Parts
12-3. Magic Remote Check(Register/Unregister) To Register Magic Remote
‘13 models -Back/Smart keys
Press the Wheel(OK) button on the remote control
Pop-up message will appear on screen
When Registration completes, another pop-up message will appear.
To bring up cursor, simply move remote around. Maximum communication distance:10m or 32.8ft
Unregister Magic Remote Control • M4 Remote
MR13P Remote
Press the “Home” and “Back” on the remote fo 5 seconds
•
The Red LED at the top of the Remote will blink 3time
•
To re-register the Remote, follow first procedure 36
Repair Method by Parts
13. Remote Control Check(Flow Chart)
Remote control(R/C) operating error
☞Page 52~55 Check R/C itself Operation
Operating OK?
Y
Check & Repair Cable connection Connector solder
N Check R/C Operating When turn off light in room
If R/C operate, Explain the customer cause is interference from light in room.
☞Page 52~55 N Operating OK? Y Close
Check & Replace Baterry of R/C
Y Operating OK? N
Replace Main B/D
Check B+ 3.5V On Main B/D
☞Page 52~55 Y Voltage OK?
☞Page 10~12
Check IR Output signal
N
Check 3.5v on Power B/D Replace Power B/D or Replace Main B/D (Power B/D don’t have problem)
Normal Signal?
Y
N
Repair/Replace IR B/D
Close
Replace R/C
37
Repair Method by Parts
13-2. Remote Control Check(Troubleshooting)
Main Board
③ ④
1 2 3 4 5 6 7 8
P4101 GND KEY1 KEY2 +3.5V_ST GND LOGO/LED_R IR GND
② ①
1.2. Check IR cable condition between IR & Main board. 3. Check the st-by 3.5V on the pin no.4 4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.
38
Repair Method by Parts
13-2. Remote Control Check(Troubleshooting)
Main Board
③
1 2 3 4 5 6 7 8
P4800 3.3V GND RX TX RESET DC DD GND
①
JCR ②
Checking order 1, 2. Check Motion cable condition between Motion assy & Main board. 3. Check the 3.3V on the pin no. 1.
39
Repair Method by Parts
13-2. Remote Control Check(Troubleshooting)
Main Board
③
④
1 2 3 4 5 6 7 8
P4002 GND KEY1 KEY2 +3.5V_ST GND LED +3.5V_ST GND
① ②
JCR
Checking order 1, 2. Check IR cable condition between IR & Main board. 3. Check the st-by 3.5V on the pin no 4,7. 4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.
40
Adjustments method after Repair Error symptom
Content
Video Error Color error
Adjustment Test pattern - ADJ Key
16. Tool option setting method after main B/D change (adjustment RGB Pattern)
You can view 6 types of patterns using the ADJ Key Checking item:
B/D!)
1. 2. 3. 4.
Defective pixel Residual image MODULE error (ADD-BAR, SCAN BAR) Video error (Classification of MODULE or Main41
Adjustments method after Repair Step 1. Check full model name of your TV(Select one)
- Press(MENU) key on remot - Press((Red) “Customer Support” key on remote - Select “Produce/Service Info” - Check “Model/Type”
Step 2. Upgrade TV a. Make a folder “LG_DTV” on USB drive b. Save the software in “LG_DTV” folder. Make sure file is unzipped before placing in Folder c. Insert USB memory drive into USB port on TV
a. Check a label on TV(Side or Rear)
b. Check menu(Non-Smart TV model)
17. Software Upgrad method with USB Memory
JCR d. Select “Start” if “TV Software Upgrade” Pop-up appears e. Save the software in “LG_DTV” folder. Make sure file is unzipped before placing in Folder f. Insert USB memory drive into USB port on TV Note) If current software on TV is same with or newer than That on USB drive, TV software Upgrade menu won’t be opend (Some USB memory devices may not be compatible with TV)
b. Check SETUP(Smart TV model) - Press(Home) key on remot - Select “SETUP” - Move to “SUPPORT” - Select “Product/Service info” - Check “Model/Type”
Please wait while the update is copied to TV ※ Don’t remove USB drive while this message is displayed ※ Don’t unplug TV power cord while this message is displayed
Software upgrade in on progress ※ Don’t unplug TV power cord while this message is displayed
After the upgrade is completed, this message is displayed TV will restart automatically in 5 sec, than TV is ready to use
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Course title Category
LCD TV Repair Guide Handbook □ Leadership
□ Marketing
□ Sales
□ Manufacturing
□ Quality
□ Biz. administration
Published on
04/01/2014
Developed by
HE CS Technology Support Team
Published by
Yongsu kim(e-mail:
[email protected])
Updated on
11/02/2014
■ CS
※ No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system without written permission from LGE.
