Technical-Guide-Troubleshooting Handbook (GPH11DU Chasis)

Technical Guide Plasma (GPH11DU Chassis) HD Models Troubleshooting Handbook Model : TH-42PZ80U TH-46PZ80U TH-50PZ80U TH-42PZ85U TH-46PZ85U TH-50PZ85U TH-42PZ800U TH-46PZ800U TH-50PZ800U TH-46PZ850U TH-50PZ850U

Panasonic Technology and Service Company National Training

This page is purposely left blank.

2

Table of Contents Subject

Page

Connector’s Location (TH-42PX80U)

5

Power LED’s Response to Shutdown Operation

Subject

Page

7

No Sound

35

LED blinks 1 time

8

Troubleshooting for Picture Problems

38

LED blinks 2 times

9-11

39

LED blinks 3 times

12

Diagnostic Method for Troubleshooting PDP Television

LED blinks 4 times

13

Troubleshooting for Picture Trouble

40

LED blinks 5 times (Quick Troubleshooting)

14

Diagnosis for Picture Problem (All Over the Screen)

42

LED blinks 5 times

15 - 18

Diagnosis of Vertical Line Problem

43

LED blinks 6 times

19

Picture Trouble at Upper or Lower half

44

SU/SD Board Isolation Procedure

20

Picture Trouble at Right or Left half (50 Inch)

45

LED blinks 7 times

21

Picture Trouble at Right or Left half (42/37 Inch)

46

LED blinks 8 times

23

Picture Trouble in 50 Inch Models

47

LED blinks 9 times

24

Picture Trouble all Over the Screen

48

LED blinks 10 times before pressing the power button

25 - 27

Examples of Symptoms and Remedies

50

LED blinks 10 times after pressing the power button

28 - 29

Self-check Procedure

56

LED blinks 11 times

30

Reset

56

LED blinks 12 times

31

Driver Setup Adjustment

57

LED blinks 13 times

32

No Power / Dead

33 - 34

3

Introduction 1. Basic concept of how to determine the defective board 1) Verification of voltages Normally, when there is a power problem, shutdown occurs immediately. So, to resolve a power problem, voltage checks are necessary before shutdown. 2) Check if the power comes up after disconnecting the board under suspicion. If power comes up (*) after disconnecting a board, the board is defective. (*) “Power comes up” equals “no shutdown”. 2. Troubleshooting Video and Audio problems 3. Examples of video problems 4. Adjustment after PCB exchange 1) After exchanging the following boards, voltage adjustment is required. P board, SC board, SS board => Please refer to the “Service Manual”.

4

Connector’s Location (TH-42PZ85U)

Figure 1

5

1. Troubleshooting Shutdown Problems

CAUTION: Some steps requires removal of connectors and sometimes PC boards removal. Do not let the TV run for more than 30 seconds while connectors or boards are disconnected.

6

Power LED’s Response to Shutdown Operation Number of blinks

Contents

Check point

1

Communication Error with Microcomputer

D, A

2

15V SOS

D

3

3.3V SOS

D

4

Power Supply SOS

P

5

5V SOS

D

SC Energy recovery SOS

SC, D, P

SC floating voltage SOS

SC, SU, SD, D, P

SS Energy recovery SOS

SS, D, P

6 7 8 9

Panel Configuration SOS

D

10

Sub 5V SOS, Main 3.3V SOS, DTV9V SOS, Tuner SOS

A

11

Fan SOS

PB, A

12

Sound SOS

A

13

Communication Error with Peaks Lite-2

A

7

LED blinks 1 time Trouble Mode

Defective Board

Communication Error

D, GS, A

TH-42PZ80/85/800U TH-46PZ80/85/800U TH-50PZ80/85/800U

TH-46PZ850U TH-50PZ850U

Disconnect A52 on the A Board (See Figure 1). Plug in the TV and turn it on

No

A board Connectors Location

Disconnect A9 on the A Board. Plug in the TV and turn it on

Is the power LED still blinking?

Replace the GS board

Warning: Disconnect AC Power prior to making any disconnection or connection

Yes

Unplug the TV and disconnect connectors P6 and P7 on the P Board (See Figure 1). Plug in the TV.

Figure 2

No Replace the D board

Is the TV turning on by itself with the following conditions? Power LED = Off SC LED= On SS LED = ON

Yes Replace the A board

8

LED blinks 2 times Trouble Mode 15V down SOS

Defective Board (Possibility) P, A, SC, SS Board (P > A, SC, SS)

P15V Distribution

Figure 3

9

2 Blinks Condition can be caused by: •

Missing P15V

•

A short of the P15V

•

Wrong diagnostic by the D board

LED blinks 2 times Trouble Mode 15V down SOS

Warning: Disconnect AC Power prior to making any disconnection or connection

Defective Board (Possibility) P, A, D, SC, SS, PB Board (P > A, SC, SS, PB) Unplug the TV and check the resistance between pin 1 of connector P7 and ground (Chassis)

No

Plug in the TV and turn it on. Measure the voltage at pin 1 of connector P7

No

Is there 15V present?

Yes

Unplug connectors P6, P7, P12, and P25 on the P board. Measure the resistance between pin 1 of connector P7 and ground (Chassis)

No

Yes

Replace The D board

Replace The P board

Is there a short circuit?

Reconnect P25 and measure the resistance between pin 1 of connector P7 and ground (Chassis)

Reconnect P12 and measure the resistance between pin 1 of connector P7 and ground (Chassis)

No

Is there a short circuit?

Is there a short circuit?

Replace The P board

Yes

Replace The SS board

No Go to the Next slide (A)

Is there a short circuit?

Yes

Disconnect SC20 on the SC board and measure the resistance between pin 1 of connector P7 and ground (Chassis

10

Go to the Next slide (B)

Yes

Continue from the previous slide (A)

Continue from the previous slide (B)

Reconnect P6 and measure the resistance between pin 1 of connector P7 and ground (Chassis

No

Is there a short circuit?

Replace The SC board Is there a short circuit?

No

Yes Replace The A board

Reconnect P7 and measure the resistance between pin 1 of connector P7 and ground (Chassis)

No

Replace The D board

Is there a short circuit?

Yes

Disconnect PB30 on the PB board and measure the resistance between pin 1 of connector P7 and ground (Chassis)

No

Is there a short circuit?

Replace The PB board

Yes

Replace The A board

11

Yes

Replace The D board

LED blinks 3 times Trouble Mode

Defective Board

3.3V down SOS

D Board

Warning: Disconnect AC Power prior to making any disconnection or connection

Replace the D board

12

LED blinks 4 times Trouble Mode Power Supply SOS

Warning: Disconnect AC Power prior to making any disconnection or connection

Defective Board Primarily P board followed by D board

4 blinks condition can be caused by: An abnormal increase in any of the voltages generated by the power supply (Vsus, Vda, P15V, P5V, STB5V)

Turn the TV on.

Yes P Board

Is pin 12 of CN P25 on the P board high before the TV shuts down?

13

No D Board

LED blinks 5 times Trouble Mode 5V SOS

Warning: Disconnect AC Power prior to making any disconnection or connection

Defective Board P, D, Cs, SC, SD, SS, D board or Panel

5 blinks condition can be caused by: • • •

P5V and Vda Distribution

Figure 4

14

•

Missing P5V A short of the P5V A short of the Vda line (Note: missing Vda from the P board does not cause 5 blinks) Wrong diagnostic by the D board

LED blinks 5 times (Quick Troubleshooting) Warning: Disconnect AC Power prior to making any disconnection or connection

Trouble Mode

Defective Board

5V SOS

P, D, Cs, SC, SS, D board or Panel

Disconnect the TV. Measure the resistance between pin 1 of connector P12 on the P board and ground (Chassis).

Yes Panel

No

Is there a short to ground?

Note: Even though it does not happen often, the 5 blinks shutdown can also be caused by one of the C boards

15

Proceed to more extensive troubleshooting of the slides that follow.

LED blinks 5 times Warning: Disconnect AC Power prior to making any disconnection or connection

Trouble Mode

Defective Board

5V SOS

P, C, SC, SS,SD, D board or Panel Use a volt-meter and place the positive probe on pin 5 of connector P25 on the P board while the negative probe is grounded. Plug in the TV and turn it on

Yes Replace the D board

Is there 5V?

No

Disconnect the TV and measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Yes Replace the P board

Is there a short to ground?

No

No

Yes

Disconnect P25 on the P board. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Reconnect P25 and disconnect SC20 on the SC board. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Is there a short to ground? Replace the P board

Yes

Is there a short to ground?

Reconnect SC20 and disconnect SS33 on the SS board. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Yes

Go to the next slide (A)

Is there a short to ground?

Disconnect SC46 and reconnect SC20 on the SC board. Measure the resistance between pin 5 of connector P25 on the P board and ground Chassis).

Yes

No Replace the SS board

No

Replace the SC board

16

Is there a short to ground?

No

Replace the SD board

LED blinks 5 times

Continue from the previous slide (A)

Reconnect SS33 and disconnect D31, D32, and D33 on the D board (To get to this connectors, remove the A Board Block Assembly). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Yes Replace the D board

Is there a short to ground?

No

TH-42PZ80/85U

TH-46PZ80/85U TH-50PZ80/85U TH-46PZ800/850U TH-50PZ800/850U

Reconnect D31 and D32 only. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

TH-42PZ85U

Figure 5

Yes

Is there a short to ground?

No Reconnect D33 and disconnect the Flex cables between the panel and the C2 board (CB9~CB15). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Disconnect the Flex cables between the panel and the C1 board (CB1~CB8). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Replace the C1 board

Yes

Is there a short to ground?

No

Is there a short to ground?

Yes

Replace the C2 board

No Replace the Panel

Go to the next slide (B)

17

Continue from the previous slide (B)

LED blinks 5 times Reconnect D31 only. Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Disconnect the Flex cables between the panel and the C1 board (CB1~CB6). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Yes Replace the C1 board

Yes

Is there a short to ground?

Is there a short to ground?

Reconnect D32 and D33 and disconnect C26 on the C2 board. Also disconnect the Flex cables between the panel and the C2 board (CB7~CB11). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

No

Yes

No

Replace the Panel

Is there a short to ground?

No

Replace the C2 board

Reconnect C26 and the Flex-cables between the panel and the C2 board. Disconnect the Flex cables between the panel and the C3 board (CB12~CB15). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).

Replace the C3 board

Yes

Is there a short to ground?

18

No Replace the Panel

LED blinks 6 times Trouble Mode

Defective Board (Possibility)

SC Energy Recovery SOS

SC, P Board (SC >D> P )

Warning: Disconnect AC Power prior to making any disconnection or connection (*2) CAUTION: Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by VSUS.

Disconnect connectors SC2, and SC20 from the SC board. Plug in the TV and turn it on.

Yes

Does the TV power up and stay on?

No

Connect SC2 (*2) and SC20. Plug in the TV and turn it on.

Replace the SC board

Yes Clean and reseat the ribbon cables between the D and the C boards. Also reseat the cables between the C boards. If problem persists, replace the D board

Does the P board output 15V at pin 1 of P7 and Vsus at pin 1 of CN P2 before the TV shuts down?

19

No

Replace the P board

SU/SD Board Isolation Procedure Unlike previous models of Panasonic Plasma TVs, the 2008 models are designed not to turn-on if either of the SU and SD boards is disconnected. Disconnecting either causes the unit to shutdown and the power LED to blink 7 times. Procedure to isolate the SU/SD board For SU board: Disconnect connectors SC41/SU41, SU11/SD11. For SD board: Disconnect connectors SC42/SD42, SC46/SD46, and SU11/SD11. Isolating the SU/SD board does not require the removal of its mounting screws. Place a jumper between “VF Ground” (labeled H.V. DANGER) on the SU board or SD board and coil L801 on the SC board, see figure 6 and 7. The jumper can be connected to the floating ground screws on the SU board, which are located above and below connector SU41, see figure 2. Caution: Before turning the unit on, confirm that the jumper is not connected to a chassis ground screw, as this will cause severe damage to the unit. Confirm proper connection by measuring continuity between floating ground and chassis ground. The resistance should be in the kilo-ohms range.

Figure 7

Figure 6

20

LED blinks 7 times Trouble Mode

Defective Board (possibility)

SC Floating voltage SOS SC, SU, SD, D, P board (SC,SU,SD>P)

Physically disconnect the SU board and the SD board. (See instructions on previous slide). Plug in the TV and turn it on.

Make sure connectors P2/SC2, SC20/D20 are not loose and are seated properly.

Reconnect the SD board only. (See instructions on previous slide). Plug in the TV and turn it on.

Does the TV shut down and the power LED blink 7 times?

No

Replace the SU board. Note: The panel can possibly cause the SU board to become damaged

No

Does the TV shut down and the power LED blink 7 times?

Yes

With the SU board and the SD board still disconnected, remove connectors SC2 and SC20 from the SC board. Plug in the TV and turn it on.

Yes No

Disconnect the SD board and reconnect the SU board. (See instructions on previous slide). Plug in the TV and turn it on.

No

Does the TV shut down and the power LED blink 7 times?

Replace the SC board.

Yes

Replace the SD, and SU board.

Replace the SD board. Note: The panel can possibly cause the SD board to become damaged

Note: The panel can possibly cause the SD and SU boards to become damaged

21

Does the TV shut down and the power LED blink 7 times?

Yes

Replace the D board.

D16280 (D280) Location PANEL

Note: The location for this component may not be the same for all models

N 2.7V SOS

To pin 66 IC9003

TH-42PZ85U

Figure 8

Anode

D16280 (D280)

Figure 10

Figure 9

22

LED blinks 8 times Trouble Mode

Defective Board (possibility)

SS Energy recovery SOS/Panel

SS, D board (SS>,D)/PDP

Warning: Disconnect AC Power prior to making any disconnection or connection

Disconnect connector SS33 from the SS board. Plug in the TV and turn it on

Yes

Does the TV power up and stay on?

No

Disconnect the TV. Use a volt-meter and place the positive probe on the anode of D280 on the SS board (See previous slide for location), while the negative probe is grounded. Plug in the TV and turn it on

Yes

Replace the panel

Replace the D board

Is there approx. 2.7V at the anode of D280 on the SS board?

23

No

Replace the SS board

LED blinks 9 times Trouble Mode

Defective Board

Panel Status

D Board

Warning: Disconnect AC Power prior to making any disconnection or connection

Replace the D board.

24

The power LED blinks 10 times at plug-in Trouble Mode

Defective Board (Possibility)

Dead/No power

P, A, GS, K, GH

10 blinks condition can be caused by: •

Missing/Shorted F_STB_15V

•

Missing/Shorted SUB9V, SUB5V, and SUB3.3V

•

Wrong diagnostic by the A board

A board Connectors Location

Sub-Voltages Distribution Diagram

Figure 11

Figure 12

25

The power LED blinks 10 times at plug-in Trouble Mode

Defective Board (Possibility)

Dead/No power

P, A, GS, K, GH

NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment.

Warning: Disconnect AC Power prior to making any disconnection or connection

NO

Unplug the TV. Using a voltmeter, place the positive probe at pin 6 of connector P7 while the negative probe is grounded. Plug in the TV

Unplug the TV and disconnect connector A1 on the A board. Plug in the TV

NO

Do the AC relays click after the TV is plugged into the AC line?

Yes

Is there 3.2V present for a couple of Yes seconds when the TV is plugged into the AC line? Replace The P board

NO

Replace The A board

Yes Do the AC relays click after the TV is plugged into the AC line?

If cable between connectors K1 and A1 is OK, Replace the K board.

26

Go to the Next slide

The power LED blinks 10 times at plug-in NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment.

Continue from the previous slide

Warning: Disconnect AC Power prior to making any disconnection or connection Unplug the TV and disconnect connector P6 on the P board. Using a voltmeter, place the positive probe at pin 7 of connector P6 while the negative probe is grounded. Plug in the TV

Is there 15V present when the TV is plugged into the AC line?

No

Replace The P board

No

Is there 15V at pin 7 of connector P6/A6 when the TV is plugged into the AC line?

Yes

No

Unplug the TV. Reconnect connector A52 and leave connector GH11 disconnected. Plug in the TV

Replace the GH board.

Does the power LED blink 10 times?

No

Unplug the TV. Reconnect connector A1 only. Plug in the TV

Replace The A board

No

Unplug the TV. Disconnect connectors A1, GS52, and GH11 on the A board. Plug in the TV

Yes

Yes Replace the GS board.

27

Does the power LED blink 10 times?

Yes

Replace the K board.

Does the power LED still blink 10 times?

Yes

Replace The A board

LED blinks 10 times after pressing the power button Trouble Mode

Warning: Disconnect AC Power prior to making any disconnection or connection (*2) CAUTION: Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by VSUS. (*3) VSUS about 180V (Accurate voltage is provided on the Panel Label) (*4) Place a jumper across pin 8 and 10 of connector P12. The unit will not enter the standby mode without the jumper.

Defective Board

SUB 5V SOS, Main 3.3V SOS DTV 9V SOS, Tuner Power SOS

P, A, SC,SS, GS, G Board

Disconnect connectors SC2 and SC20 on the Scan (SC) board. Plug in the TV and turn it on.

No

Yes

Does the unit shut down and the power LED blinks 10 times?

Unplug the TV and re-connect CN SC2(*2), and SC20 on the SC board. Disconnect CN SS11(*2), SS33, and SS34 (*4) on the SS board and CN P12 of the P board. Install the jumper from SS34 between pin 8 and 10 of CN P12. Plug in the TV and turn it on.

Replace The SC board Unplug the TV and re-connect CN SS11 (*2), SS33 and CN SS34 on the SS board and CN P12 on the P board. Measure Vsus (*3) at pin 1 of CN P11 and Vda (Approx. 75V) at pin 1 of CN P12. Plug in the TV and turn it on.

No

No

Are any of these voltages missing?

Does the power LED stay on when the TV is turned on?

Yes

Replace The P board

Replace The A board

Note: CN = Connector 28

Yes Replace The SS board

LED blinks 11 times Trouble Mode

Defective Board (Possibility)

Fan SOS

Fans, PB, A Board Fan SOS Circuit

Warning: Disconnect AC Power prior to making any disconnection or connection

11 blinks condition happens:

Figure 13

29

1.

If one of the fans opens or increases resistance.

2.

If the PB board becomes defective triggering shutdown.

3.

If the CPU in the A board gives a wrong diagnostic triggering shutdown

LED blinks 11 times Trouble Mode

Defective Board (Possibility)

Fan SOS

Fans, PB, A Board

Warning: Disconnect AC Power prior to making any disconnection or connection Caution (*5) When a fans is disconnected, place a jumper between pins 2 and 3 of the connector that the fan was removed from.

Unplug the TV and disconnect the fans, one at a time. (See caution (*5)). Plug in the TV and turn it on.

Unplug the TV and disconnect connector PB30 on the PB board. Plug in the TV and turn it on.

No

Does the power LED stay on when the TV is turned on?

Yes

Replace the Fan.

No

Does the TV stay on for more than 30 seconds when the TV is turned on?

Yes

Replace The PB board

Replace The A board

30

LED blinks 12 times Trouble Mode

Defective Board (Possibility)

Sound SOS

Speakers, A Board

Warning: Disconnect AC Power prior to making any disconnection or connection

Unplug the TV and disconnect the Left and Right speakers connectors. Plug in the TV and turn it on

Unplug the TV and disconnect connectors P6 and P7 on the P board. Plug in the TV

No

Does the power LED stay on when the TV is turned on?

Yes

Check the speakers and the speaker’s wires.

No

Is the TV turning on by itself at plug in with: Power LED = Off. LED on SS board = On. LED on SC board = On

Check P15V (Pin 1 of P6) and follow 2 blinks instructions

31

Yes

Replace The A board

LED blinks 13 times Trouble Mode

Defective Board

Communication error with IC8001 TH-42PZ80/85/800U TH-46PZ80/85/800U TH-50PZ80/85/800U

A board Connectors Location Disconnect A9 on the A Board. Plug in the TV and turn it on

Is the power LED still blinking?

Replace the GS board

A Board

TH-46PZ850U TH-50PZ850U

Disconnect A52 on the A Board (See Figure 1). Plug in the TV and turn it on

No

Warning: Disconnect AC Power prior to making any disconnection or connection

Yes

Unplug the TV and disconnect connectors P6 and P7 on the P Board (See Figure 1). Plug in the TV.

Figure 14

No Replace the D board

Is the TV turning on by itself with the following conditions? Power LED = Off SC LED= On SS LED = ON

Yes Replace the A board

32

No Power/Dead Unit Trouble Mode

Defective Board (Possibility)

Dead/No power

P, A, GS, K Unplug the TV and place your volt-meter on pin 5 of connector P7. Plug in the TV.

Yes

NO

Do the AC relays click after the TV is plugged into the AC line?

NO

Warning: Disconnect AC Power prior to making any disconnection or connection

Yes

Unplug the TV and place your volt-meter on pin 11 of connector P25 or A25. Plug in the TV and press the power switch

Is there 5V present when the TV is plugged into the AC line?

Unplug the TV

Yes

Is thereYes continuity between pins 8 and 10 of connector P12 of the P board?

Check connection between P12 and SS12. Also check for missing jumper on SS34 on the SS board. If jumper on connector SS34 is present, replace the SS board.

NO

NO

Place your volt-meter on pin 9 of connector A1. Press the power switch

Is there 3.2V present when the power button is pressed?

Yes

Disconnect connector A7. Place your volt-meter on pin 5 of connector P7. Plug in the TV and turn it on.

NO NO

Go to the Next slide

Yes Is there 5V when the TV is plugged in?

Replace The P board

Replace The A board

Does Yes pin 9 of connector A1 go from 4.5V to 0V while the power button on the TV is pressed?

If wiring connections are ok, check the S & K boards.

33

Replace The A board

Replace The P board

No Power/Dead Unit (Continue) Continue from Previous slide

Unplug the TV and place your volt-meter on pin 6 of connector P7. Plug in the TV. Unplug the TV and disconnect connector A1. Plug in the TV.

NO

Do the AC relays click after the TV is plugged into the AC line?

Yes

Reconnect A1 and disconnect connector A52. Plug in the TV.

TH-46PZ850U TH-50PZ850U

Reconnect A1 and disconnect connector A9. Plug in the TV.

Replace The A board

Yes Replace The P board

If the cable between connectors K1 and A1 is OK, Replace the K board. If the cable between connectors GS09 and A9 is OK, Replace the GS board.

TH-42PZ80/85U TH-46PZ80/85U TH-50PZ80/85U TH-42PZ800U TH-46PZ800U TH-50PZ800U

NO

NO

Is there 3.2Vor 2.7V at pin 6 of connector P7 when the TV is plugged into the AC line?

Do the AC relays click after the TV is plugged into the AC line?

Yes

TH-42PZ800U TH-46PZ800/850U TH-50PZ800/850U

Replace The A board

TH-42PZ80/85U TH-46PZ80/85U TH-50PZ80/85U

Reconnect A52 and disconnect connector A51. Plug in the TV.

TH-42PZ800U TH-46PZ800U TH-50PZ800U

Reconnect A9 and disconnect connector A51. Plug in the TV.

TH-46PZ850U TH-50PZ850U

NO

Do the AC relays click after the TV is plugged into the AC line?

Yes

TH-42PZ80/85U TH-46PZ80/85U TH-50PZ80/85U

If the cable between connectors GS52 and A52 is OK, Replace the GS board.

Replace The G board

34

No Sound Warning: Disconnect AC Power prior to making any disconnection or connection

No

Is there 15V at pin 1 of CN A6 on the A board?

Yes

Check the cable between connector A7 on the A board and P6 on the P board.

Yes

Check the speakers. (Make sure A12 is properly seated).

35

Is there a sound waveform at pin 1 and 3 of CN A12 on the A board?

No

Replace The A board

This page is purposely left blank.

36

Troubleshooting for Picture Problems

37

Diagnostic Method for Troubleshooting PDP Television 1. There are two kinds of picture problem 1) Abnormal picture 2) No picture 2. Basic concept of determining the defective board 1) Which area is the symptom displayed on the screen? A. Part of the screen B. All over the screen 3. Adjustment after PCB exchange 1) After exchanging the following boards, voltage adjustment is required. P board, SC board, SS board => Please refer to “Service Manual”.

38

Troubleshooting for Picture Trouble Start Where is the symptom displayed? Upper or Lower half

Some part of the screen Upper half

*Note :Panel gas leakage SU Board (or D, or SC)

Lower half

(from front view)

SD Board (or D, or SC) Both area SC Board (or D) Right half D Board (or C1, or Panel)

Left or Right half (from front view)

Left half D Board (or C2, or Panel)

39

Because of a very small crack in the panel, gas leakage will start. In this picture, gas leakage started at the left top corner. Finally, gas leakage will lead to the symptom “No picture with buzz noise”.

Diagnosis for Picture Problem (All Over the Screen)



Abnormal Color, Vertical Line, Sync Error, Noise Picture

All Models



D Board, SC Board, SU Board, SD Board

e.g. TH-42PZ80U

IC1100

SC

SD

A

MICRO PROCESSOR

IC9500 PICTURE OUTPUT

SS



IC9900 PLASMA AI

IC4510

HDMI I/F

SU

Buffer IC

Peaks Lite

LVDS RECEIVER

S.F. PROCESSOR

DATA DRIVER

IC8001 LVDS

Video DATA (R) Video DATA (L)

DISCHARGE CONTROL

Scan Control Pulse Sustain Control Pulse

40

Buffer IC

Diagnosis for Picture Problem (All Over the Screen)

Sample of NG Waveform

Confirm the waveform at “TPSC1” of the SC board



Correct Waveform

Waveform OK

Waveform NG Here





D Board defect

SC,SU,SD Board defect Refer to “Diagnosis (3)” on next page

TPSC1 SC

SU

SS

D

IC9300 Video/Panel Control

SD

IC9400 IC9500

PLASMA AI

DATA DRIVER

DISCHARGE CONTROL

Buffer IC

Buffer IC

Scan Control Pulse Sustain Control Pulse Video DATA (R)

Panel Drive Circuit 41

Video DATA (L)

Diagnosis for Picture Problem (All Over the Screen) Confirm the waveform at “TPSC1” after removing the SU or SD Board from the SC Board

Situation

Condition

Disconnect SU Board (Connect SD)

Disconnect SD Board (Connect SU)

Disconnect the SU and SD Boards SC

Correct Waveform

Condition 2

Cause

Waveform OK?

Bottom half of SU Board Picture OK?

Waveform OK?

Upper half of SD Board Picture OK?

Waveform OK?

Screen should SC Board be black

SU

SS

TPSC1

SD

Buffer IC

42

Buffer IC

Diagnosis of Vertical Line Problem NG Area (Front view) case1

Panel case1

case2

Thin vertical line or 1 block not lighting

PDP panel (Driver IC) NG ( or D board, or C board ) IC IC

Buffer IC C2

IC IC

1 Line

PDP Panel

Buffer BufferIC

case2

A number of blocks not lighting

D board (or C board) NG

1 Block

2 Blocks

PDP Panel

Buffer

D-board ( or C-board)

C1 C1

Driver IC

Driver IC

FPC

Driver IC

Driver IC

Drive IC(2) inside C Board

C Board Buffer

Buffer

or D Board

43

D board

FPC

Picture Trouble at Upper or Lower half



No Picture, Picture noise, Full Horizontal line, etc.

Symptom : Horizontal line (Lower side) Result : SD board

42 inch (HD Panel) (Front view)

1

Symptom : Horizontal line (Upper side) Result : D board

SU

SS

SC

2 C2

D

SD C1

Symptom : Horizontal line (Both area) Result : SS board



1 Trouble at Upper half : SU-board (SC or D) defect 2 Trouble at Lower half : SD-board (SC or D) defect (*) Full Horizontal line at both area : SS-board (D) defect 44

Picture Trouble at Right or Left half (50 Inch)



No Picture, Picture noise, etc.

Symptom : Cyan noise (Right side) Result : D board

50inch (HD Panel) (Front view) SS2 SU

2

SS

1

SC SD

SS3 C3

C2

C1



1 Trouble at Right half : D-board defect 2 Trouble at Left half : D-board defect 45

D

Picture Trouble at Right or Left half (42 Inch)



No Picture, Picture noise, Full Vertical line, etc. 42 inch (HD Panel)

(Front view) SU

SS

2

1

SC

D

SD

C2

C1



1 Trouble at Right half : D or C1 board (Panel) defect 2 Trouble at Left half : D or C2 board (Panel) defect 46

Symptom : Vertical line Result : Panel

Picture Trouble in 50 Inch Models No Picture, Picture noise, Half Vertical line, etc. 50inch (HD Panel) (Front view)

1 Trouble at Upper right : C1 board or Panel defect

SS2 SU SS

3

2

1

SC SD

C2

2 Trouble at Upper middle : C2 board or Panel defect 3 Trouble at Upper left : C3 board or Panel defect

SS3 C3

D

C1

47

Picture Trouble all Over the Screen



Picture noise, Full Vertical line, etc.

Symptom : Vertical line (All over screen) Result : D board

42inch (HD Panel) (Front view)

Symptom : White balance NG Result : D board

SU

1

SS

SC D

SD C2

C1

Symptom : Abnormal Picture Result : SC board



1 Trouble at All area : D or SC board (SU,SD) defect 48

Examples of Symptoms and Remedies

49

Picture Problem (All over the screen) Noise Picture Model : 42 inch Result : A Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : A Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SC Board

50

Picture Problem (All over the screen) Vertical Line Model : 42 inch Result : D Board

Model : 42 inch Result :D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SD Board

Model : 42 inch Result : SD Board

51

Picture Problem (All over the screen) Abnormal Color, White Balance NG Model : 42 inch Result : D Board

Yellow

Model : 42 inch Result : D Board

Red

Model : 42 inch Result : D Board

Green

Model : 42 inch Result : D Board

Magenta

Model : 42inch Result : D Board

Red

Model : 42 inch Result : D Board

Blue

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Model : 42 inch Result : D Board

Magenta

Model : 42 inch Result : D Board

Cyan

Model : 42 inch Result : D Board

Abnormal Color

Picture Problem (All over the screen) Sync Error Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

53

Picture Problem (Right half or Left half) Vertical Line Model : 50 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

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Picture Problem (Upper or Bottom) Vertical Line Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : SU Board

Model : 42 inch Result : D Board

Model : 42 inch Result : SC Board

Model : 42 inch Result : SS Board

Model : 42 inch Result : SU Board

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Self-check Procedure NOTE: This procedure does

CHASSIS: GPH11D All models

not reset the TV

Self-check Screen

How to access the self-check screen to reset the unit. Select a television channel, and while pressing the [VOLUME ( - )] button on the main unit, press the [OK] button on the remote control for more than 3 seconds.

How to Exit the self-check screen Press and hold the Power button on the TV for 5 seconds or disconnect the AC cord from the wall outlet. TV volume down & OK on remote only does a basic IC self check. It does NOT Reset the TV. It does not clear channel programmed settings, picture settings, channel labels, LOCK mode settings, or password. Using this method, it shows the unit firmware version (Peaks 1.050 and GenX 1.00) and it checks IC communications ONLY. This is more useful to identify the firmware version without having to decode the info in the setup menu About/Version screen.

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Reset Procedure CHASSIS: GPH11D All models

To Reset the Unit, turn the TV on and while pressing the “VOLUME ( - )” button on the main unit, press the “Menu” button on the remote control for more than 3 seconds. The Self-Check menu appears on screen. Then, disconnect the AC cord from the wall outlet.

Note: All customer programmed parameters will be erased.

57