Read 2007 PDP Troubleshooting Flowchart text version

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 Connector's Location (TH-42PX80U) Power LED's Response to Shutdown Operation LED blinks 1 time LED blinks 2 times LED blinks 3 times LED blinks 4 times LED blinks 5 times (Quick Troubleshooting) LED blinks 5 times LED blinks 6 times SU/SD Board Isolation Procedure LED blinks 7 times LED blinks 8 times LED blinks 9 times LED blinks 10 times before pressing the power button LED blinks 10 times after pressing the power button LED blinks 11 times LED blinks 12 times LED blinks 13 times No Power / Dead Page 5 7 8 9-11 12 13 14 15 - 18 19 20 21 23 24 25 - 27 28 - 29 30 31 32 33 - 34

No Sound Troubleshooting for Picture Problems Diagnostic Method for Troubleshooting PDP Television Troubleshooting for Picture Trouble Diagnosis for Picture Problem (All Over the Screen) Diagnosis of Vertical Line Problem Picture Trouble at Upper or Lower half Picture Trouble at Right or Left half (50 Inch) Picture Trouble at Right or Left half (42/37 Inch) Picture Trouble in 50 Inch Models Picture Trouble all Over the Screen Examples of Symptoms and Remedies Self-check Procedure Reset Driver Setup Adjustment

Subject

Page

35 38 39 40 42 43 44 45 46 47 48 50 56 56 57

3

Introduction

<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

<LED Blinking timing>

Number of blinks 1 2 3 4 5 6 7 8 9 10 11 12 13 Contents Communication Error with Microcomputer 15V SOS 3.3V SOS Power Supply SOS 5V SOS SC Energy recovery SOS SC floating voltage SOS SS Energy recovery SOS Panel Configuration SOS Sub 5V SOS, Main 3.3V SOS, DTV9V SOS, Tuner SOS Fan SOS Sound SOS Communication Error with Peaks Lite-2 Check point D, A D D P D SC, D, P SC, SU, SD, D, P SS, D, P D A PB, A A A

7

LED blinks 1 time

Trouble Mode Communication Error

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

Defective Board D, GS, A

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

TH-46PZ850U TH-50PZ850U

A board Connectors Location

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

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

No

Is the power LED still blinking?

Yes

Replace the GS board

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

Figure 2 Is the TV turning on by itself with the following conditions? Power LED = Off SC LED= On SS LED = ON

No

Replace the D board

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)

2 Blinks Condition can be caused by: · · Missing P15V A short of the P15V Wrong diagnostic by the D board

P15V Distribution

·

Figure 3

9

LED blinks 2 times

Trouble Mode

15V down SOS

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)

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

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

No

Is there a short circuit?

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

Is there 15V present?

Yes

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

No

Is there a short circuit?

Yes

Replace The P board

Replace The D board

Replace The P board

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

No

Is there a short circuit?

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

Go to the Next slide (B)

10

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?

Yes

Replace The SC board

Replace The D board

No

Is there a short circuit?

Yes

Replace The A board

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

No

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)

Replace The D board

No

Is there a short circuit?

Yes

Replace The PB board

Replace The A board

11

LED blinks 3 times

Trouble Mode 3.3V down SOS Defective Board 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 Defective Board Primarily P board followed by D board

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

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?

No

D Board

13

LED blinks 5 times

Trouble Mode 5V SOS Defective Board P, D, Cs, SC, SD, SS, D board or Panel

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

5 blinks condition can be caused by:

· · · 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

P5V and Vda Distribution

·

Figure 4

14

LED blinks 5 times (Quick Troubleshooting)

Trouble Mode 5V SOS Defective Board P, D, Cs, SC, SS, D board or Panel

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

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

Yes

Panel

Is there a short to ground?

No

Proceed to more extensive troubleshooting of the slides that follow.

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

15

LED blinks 5 times

Trouble Mode 5V SOS Defective Board 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 Warning: Disconnect AC Power prior to making any disconnection or connection

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).

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

Yes

No

Is there a short to ground? Replace the P board

Yes

Replace the P board

Is there a short to ground?

No

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).

Yes

Is there a short to ground?

No

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).

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

Go to the next slide (A)

Is there a short to ground?

No

Replace the SS board Replace the SC board

Yes

Is there a short to ground?

No

Replace the SD board

16

Continue from the previous slide (A)

LED blinks 5 times

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). Figure 5

TH-42PZ85U

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).

No

Is there a short to ground?

Yes

Replace the C2 board

Replace the C1 board

Yes

Is there a short to ground?

No

Replace the Panel Go to the next slide (B)

17

LED blinks 5 times

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

Continue from the previous slide (B)

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

Is there a short to ground?

No

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).

Yes

Replace the C1 board

Is there a short to ground?

No

Yes

Is there a short to ground?

No

Replace the Panel

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?

No

Replace the Panel

18

LED blinks 6 times

Trouble Mode SC Energy Recovery SOS Defective Board (Possibility) SC, P Board (SC >D> P )

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

Yes

Does the TV power up and stay on?

No

Replace the SC board

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

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?

No

Replace the P board

19

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 6

Figure 7

20

LED blinks 7 times

Trouble Mode Defective Board (possibility) SC Floating voltage SOS SC, SU, SD, D, P board (SC,SU,SD>P)

Make sure connectors P2/SC2, SC20/D20 are not loose and are seated properly. Does the TV shut down and the power LED blink 7 times? 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. Physically disconnect the SU board and the SD board. (See instructions on previous slide). Plug in the TV and turn it on.

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

No

Yes

No

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

Yes No

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

Yes

Replace the SU board.

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

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

Replace the SC board.

Replace the D board.

No

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

Yes

Replace the SD board.

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

Replace the SD, and SU board.

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

21

D16280 (D280) Location

PANEL

N 2.7V SOS Note: The location for this component may not be the same for all models

To pin 66 IC9003

TH-42PZ85U

Figure 8

Anode

D16280 (D280)

Figure 9

Figure 10

22

LED blinks 8 times

Trouble Mode SS Energy recovery SOS/Panel Defective Board (possibility) 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

Replace the D board

Yes

Replace the panel

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

No

Replace the SS board

23

LED blinks 9 times

Trouble Mode Panel Status Defective Board 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 Dead/No power Defective Board (Possibility) 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

Sub-Voltages Distribution Diagram

A board Connectors Location

Figure 11

Figure 12

25

The power LED blinks 10 times at plug-in

Trouble Mode Dead/No power Defective Board (Possibility) 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 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

NO

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

Yes

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

NO

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

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

Replace The A board

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

Go to the Next slide

26

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.

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 Continue from the previous slide

No

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

Yes

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

No

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

Yes

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

No

Does the power LED still blink 10 times?

Yes

Replace The P board

Replace The A board

No

Does the power LED blink 10 times?

Yes

Replace The A board

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

Replace the K board.

No

Replace the GH board.

Does the power LED blink 10 times?

Yes

Replace the GS board.

27

LED blinks 10 times after pressing the power button

Trouble Mode SUB 5V SOS, Main 3.3V SOS DTV 9V SOS, Tuner Power SOS Defective Board P, A, SC,SS, GS, G Board

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.

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

No

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

Yes

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

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

Yes

Replace The SS board

No

Are any of these voltages missing?

Yes

Replace The A board

Replace The P board

Note: CN = Connector 28

LED blinks 11 times

Trouble Mode Fan SOS Defective Board (Possibility) Fans, PB, A Board Fan SOS Circuit

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

11 blinks condition happens: 1. 2. If one of the fans opens or increases resistance. If the PB board becomes defective triggering shutdown. If the CPU in the A board gives a wrong diagnostic triggering shutdown

3.

Figure 13

29

LED blinks 11 times

Trouble Mode Fan SOS Defective Board (Possibility) Fans, PB, A Board

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

Replace The PB board

30

LED blinks 12 times

Trouble Mode Sound SOS Defective Board (Possibility) Speakers, A Board

Unplug the TV and disconnect the Left and Right speakers connectors. Plug in the TV and turn it on Warning: Disconnect AC Power prior to making any disconnection or connection

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

Yes

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

Replace The A board

31

LED blinks 13 times

Trouble Mode Communication error with IC8001

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

Defective Board A Board

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

TH-46PZ850U TH-50PZ850U

A board Connectors Location

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

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

No

Is the power LED still blinking?

Yes

Replace the GS board

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

Figure 14 Is the TV turning on by itself with the following conditions? Power LED = Off SC LED= On SS LED = ON

No

Replace the D board

Yes

Replace the A board

32

No Power/Dead Unit

Trouble Mode Dead/No power Defective Board (Possibility) P, A, GS, K

Unplug the TV and place your volt-meter on pin 5 of connector P7. Plug in the TV.

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

NO

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

Yes

Yes

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

NO

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 Unplug the TV

Yes

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

NO

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

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 Yes

Is there 5V when the TV is plugged in?

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

Go to the Next slide

Replace The P board

Replace The A board

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

Replace The A board

Replace The P board

33

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

NO

Yes

Replace The P board

NO

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

Yes

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

Reconnect A1 and disconnect connector A52. Plug in the TV. Reconnect A1 and disconnect connector A9. Plug in the TV.

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

TH-46PZ850U TH-50PZ850U

Replace The A board Reconnect A52 and disconnect connector A51. Plug in the TV.

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

NO

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

Yes

TH-42PZ800U TH-46PZ800U TH-50PZ800U TH-46PZ850U TH-50PZ850U

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

NO

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

Yes

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

Replace The A board

Replace The G board

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

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

No

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

Replace The A board

35

This page is purposely left blank.

36

Troubleshooting for Picture Problems

37

Diagnostic Method for Troubleshooting PDP Television

<Introduction> 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

<How to determine the defective board>

Start Where is the symptom displayed? Upper or Lower half

(from front view)

Some part of the screen

Upper half SU Board (or D, or SC) Lower half SD Board (or D, or SC) Both area SC Board (or D) Right half 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".

*Note :Panel gas leakage

Left or Right half

(from front view)

D Board (or C1, or Panel) Left half D Board (or C2, or Panel)

39

Diagnosis for Picture Problem (All Over the Screen)

<Symptom>

Abnormal Color, Vertical Line, Sync Error, Noise Picture

<Model>

All Models

<Sample Picture>

<Possible Cause>

D Board, SC Board, SU Board, SD Board

<Block Diagram>

e.g. TH-42PZ80U

SC SU SS

IC1100

SD

<Back side view>

A

IC9500 PICTURE OUTPUT LVDS RECEIVER DISCHARGE CONTROL

IC9900 PLASMA AI

Buffer IC Buffer IC

MICRO PROCESSOR IC4510

HDMI I/F

Peaks Lite IC8001 LVDS

S.F. PROCESSOR

DATA DRIVER

Video DATA (R) Video DATA (L)

Scan Control Pulse Sustain Control Pulse

40

Diagnosis for Picture Problem (All Over the Screen)

<Diagnosis (2)>

Confirm the waveform at "TPSC1" of the SC board

Sample of NG Waveform

<Result>

Waveform OK

Correct Waveform

<Result>

Waveform NG

Here

<Cause>

D Board defect

<Cause>

SC,SU,SD Board defect

Refer to "Diagnosis (3)" on next page

TPSC1

SC SU

SS

<Back side view>

IC9300 Video/Panel Control IC9400 IC9500 PLASMA AI DISCHARGE CONTROL Scan Control Pulse Sustain Control Pulse Video DATA (R) Video DATA (L)

D

SD

Buffer IC

Buffer IC

DATA DRIVER

Panel Drive Circuit 41

Diagnosis for Picture Problem (All Over the Screen)

<Diagnosis (3)>

Confirm the waveform at "TPSC1" after removing the SU or SD Board from the SC Board

<Result> Situation

Disconnect SU Board

(Connect SD)

Condition

Waveform OK? Waveform OK? Waveform OK?

Condition 2

Cause

Bottom half of SU Board Picture OK? Upper half of SD Board Picture OK? Screen should SC Board be black

SS

Disconnect SD Board

(Connect SU)

Disconnect the SU and SD Boards

SC

SU

Correct Waveform

TPSC1

SD

<Back side view>

Buffer IC

Buffer IC

42

Diagnosis of Vertical Line Problem

NG Area (Front view)

Panel case1 case2 case1

Thin vertical line or 1 block not lighting

case2

A number of blocks not lighting

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

IC IC IC IC

D board (or C board) NG

2 Blocks

1 Line

1 Block Buffer

Buffer IC C2

Buffer IC Buffer C1 C1

PDP Panel

D-board ( or C-board)

PDP Panel

Driver IC

Drive IC(2) inside

C Board Buffer

Driver IC

FPC

Driver IC

Driver IC

FPC

C Board Buffer

or

D Board D board

43

Picture Trouble at Upper or Lower half

<Symptom> No Picture, Picture noise, Full Horizontal line, etc. <Models> 42 inch (HD Panel) <NG Area> (Front view)

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

<Actual Symptom>

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

1

SS

SU SC

2

C2 C1

SD

D

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

<Defective 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)

<Symptom> No Picture, Picture noise, etc. <Models> 50inch (HD Panel) <NG Area> (Front view)

SS2 SU SS SS3 C3 C2 C1

<Actual Symptom>

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

2

1

SD

SC

D

<Defective board>

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

45

Picture Trouble at Right or Left half (42 Inch)

<Symptom> No Picture, Picture noise, Full Vertical line, etc. 42 inch (HD Panel) <NG Area> (Front view)

SU SS

<Actual Symptom>

Symptom : Vertical line Result : Panel

2

1

SD

SC

D

C2 <Defective board>

C1

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

46

Picture Trouble in 50 Inch Models

<Symptom> No Picture, Picture noise, Half Vertical line, etc. <Models> 50inch (HD Panel) <NG Area> (Front view)

SS2 SU SS SS3 C3 C2 C1

<Defective board>

1 Trouble at Upper right : C1 board or Panel defect

3

2

1

SD

SC

D

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

47

Picture Trouble all Over the Screen

<Symptom> Picture noise, Full Vertical line, etc. <Models> 42inch (HD Panel) <NG Area (e.g. 42 inch Panel)> (Front view)

SU SS

Symptom : White balance NG Result : D board

<Actual Symptom>

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

1

SD C2 C1

SC D

Symptom : Abnormal Picture Result : SC board

<Defective 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)

<Symptom> Noise Picture <Photo of Symptom>

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)

<Symptom> Vertical Line <Photo of Symptom>

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)

<Symptom> Abnormal Color, White Balance NG <Photo of Symptom>

Model : 42 inch Result : D Board Model : 42 inch Result : D Board Model : 42 inch Result : D Board

Yellow

Magenta

Magenta

Model : 42 inch Result : D Board

Model : 42inch Result : D Board

Model : 42 inch Result : D Board

Red

Red

Cyan

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Model : 42 inch Result : D Board

Green

Blue

Abnormal Color

52

Picture Problem (All over the screen)

<Symptom> Sync Error <Photo of Symptom>

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)

<Symptom> Vertical Line <Photo of Symptom>

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

54

Picture Problem (Upper or Bottom)

<Symptom> Vertical Line <Photo of Symptom>

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

55

Self-check Procedure

CHASSIS: GPH11D

All models NOTE: This procedure does not reset the TV

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.

Self-check Screen

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.

56

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

Information

2007 PDP Troubleshooting Flowchart

57 pages

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