Panas

Model : TH-42PZ80UTH-46PZ80UTH-50PZ80UTH-42PZ85UTH-46PZ85UTH-50PZ85U

TH-42PZ800UTH-46PZ800UTH-50PZ800UTH-46PZ850UTH-50PZ850U

Technical GuideTechnical GuidePlasmaPlasma

(GPH11DU Chassis)(GPH11DU Chassis)HD ModelsHD Models

Troubleshooting HandbookTroubleshooting Handbook

Panasonic Technology and Service CompanyNational Training

This page is purposely left blank.

2

Table of Contents

3

Subject Page

No Sound 35

Troubleshooting for Picture Problems 38

Diagnostic Method for Troubleshooting PDP Television

39

Troubleshooting for Picture Trouble 40

Diagnosis for Picture Problem (All Over the Screen) 42

Diagnosis of Vertical Line Problem 43

Picture Trouble at Upper or Lower half 44

Picture Trouble at Right or Left half (50 Inch) 45

Picture Trouble at Right or Left half (42/37 Inch) 46

Picture Trouble in 50 Inch Models 47

Picture Trouble all Over the Screen 48

Examples of Symptoms and Remedies 50

Self-check Procedure 56

Reset 56

Driver Setup Adjustment 57

Subject Page

Connector’s Location (TH-42PX80U) 5

Power LED’s Response to Shutdown Operation 7

LED blinks 1 time 8

LED blinks 2 times 9-11

LED blinks 3 times 12


LED blinks 5 times (Quick Troubleshooting) 14

LED blinks 5 times 15 - 18


SU/SD Board Isolation Procedure 20




LED blinks 10 times before pressing the power button 25 - 27

LED blinks 10 times after pressing the power button 28 - 29




No Power / Dead 33 - 34

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

5

Connector’s Location (TH-42PZ85U)

Figure 1

1. Troubleshooting Shutdown Problems

6

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.

Power LED’s Response to Shutdown Operation<LED Blinking timing>

7

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

6 SC Energy recovery SOS

SC, D, P

7 SC floating voltage SOS

SC, SU, SD, D, P

8 SS Energy recovery SOS

SS, D, P

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

LED blinks 1 timeTrouble Mode

Communication Error

Defective Board

D, GS, A

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

Replace the GS board

No Yes

8

Figure 2

Is the power LED still blinking?

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

Is the TV turning on by itself with the following

conditions? Power LED = Off

SC LED= OnSS LED = ONReplace the D

boardReplace the A

board

No Yes

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

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

TH-46PZ850UTH-50PZ850U

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

A board Connectors Location

LED blinks 2 timesTrouble Mode

15V down SOS

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

9

2 Blinks Condition can be caused by:

• Missing P15V

• A short of the P15V

• Wrong diagnostic by the D board

Figure 3

P15V Distribution


15V down SOS

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

10

No Yes

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

Is there a short

circuit?

Unplug the TV and check the resistance between pin 1 of connector P7 and ground (Chassis)

Is there a short

circuit?

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

Is there 15V

present?

No Yes

ReplaceThe P board

ReplaceThe D board

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

Is there a short

circuit?

No Yes

ReplaceThe P board


Is there a short

circuit?

No Yes

ReplaceThe SS board

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)Go to the

Next slide (A)


11

Continue from the previous slide (B)

Continue from the previous slide (A)

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

Is there a short

circuit?

No Yes

ReplaceThe A board


Is there a short

circuit?

No Yes

ReplaceThe D board

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

Is there a short

circuit?

ReplaceThe PB board

ReplaceThe A board

No Yes

Is there a short

circuit?

No Yes

ReplaceThe D board

ReplaceThe SC board


3.3V down SOS

Defective Board

D Board

Replace the D board

12



Power Supply SOS

Defective Board

Primarily P board followed by D board

Yes No

13

D BoardP Board

Turn the TV on.

Is pin12 of CN P25

on the P board high

before the TV shuts down?


An abnormal increase in any of the voltages generated by the power supply (Vsus, Vda, P15V, P5V, STB5V)

4 blinks condition can be caused by:


5V SOS

Defective Board

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

14



Figure 4

• 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 boardP5V and Vda Distribution

LED blinks 5 times (Quick Troubleshooting)Trouble Mode

5V SOS

Defective Board

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

15

Proceed to more extensive troubleshooting of the slides that follow.

No


Is there a short to ground?

Panel

Note: Even though it does not happen often, the 5 blinks shutdowncan also be caused by

one of the C boards


5V SOS

Defective Board

P, C, SC, SS,SD, D board or Panel

16

Disconnect the TV and measure the resistance between pin 5 of connector P25 on

the P board and ground (Chassis).

Yes NoIs there a short to ground?

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

Is there 5V?

Yes NoReplace

the D board

Replacethe P board

Disconnect P25 on the P board. Measure the resistance between pin 5 of connector P25 on

the P board and ground (Chassis).


Replacethe P board

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 No

Is there a short to ground?

Replacethe SC board

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).

YesNoIs there a

short to ground?

Replacethe SD board

Go to the next slide (A)


Replacethe SS board


LED blinks 5 times

17

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).


Replacethe D board

Reconnect D31 and D32 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~CB8). Measure the resistance between pin 5 of connector P25 on the P board and ground (Chassis).


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).

Replacethe C1 board

Replacethe Panel

YesNo Is there a short to ground?

Replacethe C2 board

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

TH-46PZ800/850UTH-50PZ800/850U

Go to the next slide (B)

TH-42PZ85U

Figure 5

LED blinks 5 times

18

Continue from the previous slide (B)

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).


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).

Replacethe C1 board

Replacethe Panel


Replacethe 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).


Replacethe C3 board

Replacethe Panel


SC Energy Recovery SOS

Defective Board (Possibility)

SC, P Board (SC >D> P )

Yes No

19

No

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

Yes

Does the TV power

up andstay on?

Disconnectconnectors SC2, and SC20 from the SC board. Plug in

the TV and turn it on.

Connect SC2 (*2) and SC20. 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.

Does the Pboard output

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

Replacethe SC board

Replacethe P board

SU/SD Board Isolation Procedure

Procedure to isolate the SU/SD boardFor 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.

20Figure 6

Figure 7

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.

Yes

YesNo

Replace the SU board.

YesNo

YesNo

Replace the SD, and SU board.

Replace the SD board.

Replace the SC board.

No

Replace the D board.

Reconnect the SD board only. (See instructions on previous slide).

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.

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.

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

Does the TV shut down and the power

LEDblink 7 times?


LEDblink 7 times?


LEDblink 7 times?


LEDblink 7 times?

21


SC Floating voltage SOS

Defective Board (possibility)

SC, SU, SD, D, P board (SC,SU,SD>P)

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

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

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

D16280 (D280) Location

22

Figure 10

Anode

D16280(D280)

PANEL

TH-42PZ85U

To pin 66 IC9003

N 2.7V SOS

Figure 8

Figure 9

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


SS Energy recovery SOS/Panel

Defective Board (possibility)

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

No Yes

23

Yes No

Disconnectconnector SS33 from the SS board. Plug in the TV

and turn it on

Does the TV power

up andstay on?

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

the SS board?

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

Replacethe D board

Replacethe SS board

Replacethe panel



Panel Status

Defective Board

D Board

Replace the D board.

24


The power LED blinks 10 times at plug-in

25

Trouble Mode

Dead/No power


P, A, GS, K, GH• Missing/Shorted F_STB_15V

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

• Wrong diagnostic by the A board


A board Connectors LocationSub-Voltages Distribution Diagram

Figure 11 Figure 12


Is there 3.2V present for a couple of

seconds when the TV is pluggedinto the AC

line?

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

NO

NO Yes

Yes

ReplaceThe P board

Do the AC relaysclick after the TV is plugged

into the AC line?

ReplaceThe A board

26

Trouble Mode

Dead/No power


P, A, GS, K, GH


into the AC line?

NO

Go to the Next slide

Yes

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.


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


Yes

Is there 15V present when the TVis plugged into the

AC line?

Continue from the previous slide

Is there 15V at

pin 7 of connector P6/A6 whenthe TV is plugged into

the AC line?

No

Yes

Replace the K board.

No

No

Yes

YesDoes thepower LEDstill blink 10 times?

ReplaceThe A board

Replace the GS board.

ReplaceThe A board

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.

27

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

No

ReplaceThe P board

Unplug the TV. Disconnect connectors A1, GS52, and

GH11 on the A board.Plug in the TV

Unplug the TV. Reconnect

connector A52 and leave connector GH11

disconnected.Plug in the TV


Unplug the TV. Reconnect connector A1 only.

Plug in the TV

No YesDoes thepower LED

blink 10 times?

Does thepower LED

blink 10 times?Replace the GH board.

LED blinks 10 times after pressing the power buttonTrouble Mode

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

Defective Board

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

28

YesNo

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.

YesNo

Note: CN = Connector

ReplaceThe SS board

ReplaceThe SC 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.

Does the unit shut down and the

power LED blinks 10 times?

Does the power LED stay on

when the TV is turned on?

Are any of these

voltages missing?

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.

ReplaceThe P board

ReplaceThe A board


Fan SOS


Fans, PB, A Board

29


Figure 13

11 blinks condition happens:

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

Fan SOS Circuit


Fan SOS


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.

No Yes

ReplaceThe PB board



Replace the Fan.

30

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


No Yes

Caution (*5) When a fans is disconnected, place a jumper between pins 2 and 3 of the connector that the fan was removed from.

Does the TV stay on for

more than 30 seconds


ReplaceThe A board


Sound SOS


Speakers, A Board

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

No Yes

ReplaceThe A board



Check the speakers andthe speaker’s wires.

31

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


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

LED on SS board = On.LED on SC board = On

No Yes

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

LED blinks 13 times

32


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

Replace the GS board

No Yes

Figure 14

Is the power LED still blinking?

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

Is the TV turning on by itself with the following

conditions? Power LED = Off

SC LED= OnSS LED = ONReplace the D

boardReplace the A

board

No Yes

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


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

Trouble Mode

Communication error with IC8001

Defective Board

A Board

A board Connectors Location

No Power/Dead Unit


into the AC line?

Doespin 9 of connector

A1 go from 4.5V to 0V while the power button on the TV is

pressed?

Is there 5V presentwhen the TV is plugged into

the AC line?

Is there 5V when the TV is plugged in?

If wiring connections are ok, check

the S & K boards.

ReplaceThe A board

ReplaceThe P board

ReplaceThe P board

ReplaceThe A board

Go to the Next slide

Yes

Yes

Yes

Yes

Yes

NO

NO

NO

NO

NO

Yes

NO

33

Trouble Mode

Dead/No power


P, A, GS, K

Is there continuity between pins 8 and

10 of connector P12 of the P

board?

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 3.2V present when

the power button is pressed?

Unplug the TV

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.

Yes

Disconnect connector A7. Place your volt-meter on pin 5 of connector P7.

Plug in the TV and turn it on.

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


Unplug the TV and place your volt-meter on pin 5 of

connector P7. Plug in the TV.

No Power/Dead Unit (Continue)

Is there 3.2Vor 2.7V at

pin 6 of connector P7 when the TV is plugged into

the AC line?

Do the ACrelays click after

the TV is plugged intothe AC line?

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

Continue from Previous slide

NO

NO

NO Yes

Yes

Yes

ReplaceThe P board

Do the AC relays click after


ReplaceThe A board

If the cable between connectors GS52and A52 is OK, Replace the GS board.

34

Unplug the TV and disconnect

connector A1. Plug in the TV.

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

Unplug the TV and place your volt-meter on pin 6 of

connector P7. Plug in the TV.


TH-42PZ80/85UTH-46PZ80/85UTH-50PZ80/85UTH-42PZ800UTH-46PZ800UTH-50PZ800U


Reconnect A1 and disconnect connector

A9. Plug in the TV.TH-42PZ80/85UTH-46PZ80/85UTH-50PZ80/85U

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

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

TH-42PZ800UTH-46PZ800/850UTH-50PZ800/850U


ReplaceThe G board

TH-42PZ800UTH-46PZ800UTH-50PZ800U


Do the ACrelays click after


NO Yes

ReplaceThe A board

No Sound

NoYes

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

No

35

Yes

Check the cable between connector A7 on the A board

and P6 on the P board.

Is there 15V at pin 1 of CN A6

on the A board?

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

ReplaceThe A board


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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

Where isthe symptom

displayed?

*Note :Panel gas leakage

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”.

<How to determine the defective board> Start

Upper or Lower half(from front view)

Upper half

Lower half

Both area

SU Board (or D, or SC)

SD Board (or D, or SC)

SC Board (or D)

Right half

Left half

Left or Right half(from front view)

D Board (or C1, or Panel)

D Board (or C2, or Panel)

Some part of the screen

39

<Symptom>Abnormal Color, Vertical Line, Sync Error, Noise Picture

Diagnosis for Picture Problem (All Over the Screen)

<Model>All Models

<Sample Picture>

<Block Diagram>

<Possible Cause>

<Back side view>

IC9900

DATADRIVER

IC9500AMICRO

PROCESSOR

IC4510

PeaksLite

IC1100

HDMI I/F

PICTUREOUTPUT

IC8001

S.F. PROCESSOR

PLASMA AI

DISCHARGECONTROL

LVDSRECEIVER

SU

SD

SC SS

Buffer IC Buffer IC

Video DATA (R)

Video DATA (L)

Sustain Control PulseScan Control Pulse

D Board, SC Board, SU Board, SD Board

e.g. TH-42PZ80U

40

LVDS

<Diagnosis (2)>


IC9500

IC9300

IC9400

D

DISCHARGECONTROL

Video/PanelControl

<Back side view>

SU

SD

SC SS

Buffer IC Buffer IC

Sustain Control PulseScan Control Pulse

D Board defect

Waveform OK

SC,SU,SD Board defect

Waveform NG

Refer to “Diagnosis (3)”on next page

<Result>

<Cause>

Confirm the waveform at “TPSC1” of the SC board

Video DATA (R) Video DATA (L)

TPSC1

Panel Drive Circuit

Correct Waveform

Sample of NG Waveform

Here

<Result>

<Cause>

41

DATADRIVER

PLASMA AI

<Diagnosis (3)>


<Result>

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

Situation

Disconnect SU Board(Connect SD)

Condition

Waveform OK?

Cause

SU Board

Disconnect SD Board(Connect SU)

Waveform OK? SD Board

Disconnect the SUand SD Boards Waveform OK? SC Board

<Back side view>

SU

SD

SC SS

Buffer IC Buffer IC

TPSC1Correct Waveform

Condition 2Bottom half ofPicture OK?Upper half ofPicture OK?

Screen shouldbe black

42

C1Buffer

C2Buffer

Diagnosis of Vertical Line Problem

A number of blocksnot lighting

Thin vertical lineor 1 block not lighting

D board (or C board) NG

D-board ( or C-board)

FPC

1 Line

FPC

Buffer

C Board

Buffer

C Board

Driver IC

1 Block 2 Blocks

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

Driver IC Driver IC Driver IC

PDP PanelPDP Panel

NG Area (Front view)

Panel case1 case2

case2

Drive IC(2) inside

orD boardD Board

case1

C1Buffer IC Buffer IC

IC IC IC IC

43

Picture Trouble at Upper or Lower half

(Front view)

SC

SU

SD

SS

C1C2

1

2 D

<Symptom>

<Defective board>

Trouble at Lower half : SD-board (SC or D) defect

1

2

Trouble at Upper half : SU-board (SC or D) defect

<NG Area>

No Picture, Picture noise, Full Horizontal line, etc.<Actual Symptom>

Full Horizontal line at both area : SS-board (D) defect(*)

SymptomResult

SymptomResult

SymptomResult

: Horizontal line (Lower side): SD board

: Horizontal line (Upper side): D board

: Horizontal line (Both area): SS board

44

<Models>42 inch (HD Panel)

Picture Trouble at Right or Left half (50 Inch)<Symptom>

No Picture, Picture noise, etc.

Trouble at Left half : D-board defect

12

Trouble at Right half : D-board defect

SymptomResult

: Cyan noise (Right side): D board

<Actual Symptom><Symptom>

<Defective board>

<NG Area>

<Models>50inch (HD Panel)

SC

SU

SD

SS

C1C3

SS2

SS3C2

D12

(Front view)

45

Picture Trouble at Right or Left half (42 Inch)<Symptom>

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

(Front view)

SC

SU

SD

SS

C1C2

D12

Trouble at Left half : D or C2 board (Panel) defect

1

2

Trouble at Right half : D or C1 board (Panel) defect

SymptomResult

: Vertical line: Panel

<Actual Symptom><Symptom>

<Defective board>

<NG Area>

42 inch (HD Panel)

46

Picture Trouble in 50 Inch Models<Symptom>

No Picture, Picture noise, Half Vertical line, etc.<Symptom>

<NG Area>


1 Trouble at Upper right :

2 Trouble at Upper middle :

C1 board or Panel defect

3



SC

SU

SD

SS

C1C3

SS2

SS3C2

D12

(Front view)<Defective board>

3

Trouble at Upper left :

47

Picture Trouble all Over the Screen<Symptom>

(Front view)

SU

SD

SS

C1C2

1

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

SymptomResult

SymptomResult

SymptomResult

: Vertical line (All over screen): D board

: White balance NG: D board

: Abnormal Picture: SC board

DSC

<Actual Symptom>Picture noise, Full Vertical line, etc.

<Symptom>

<NG Area (e.g. 42 inch Panel)>


<Defective board>

48

Examples of Symptoms and Remedies

49

<Symptom> Noise Picture

<Photo of Symptom>

Picture Problem (All over the screen)

Model : 42 inch Result : A Board Model : 42 inchResult : D Board

Model : 42 inch Result : D Board

Model : 42 inchResult : A Board

Model : 42 inch Result : SC Board

Model : 42 inchResult : SC Board




50

<Symptom> Vertical Line

<Photo of Symptom>


Model : 42 inchResult : D Board

Model : 42 inchResult :D Board






Model : 42 inchResult : SD Board

Model : 42 inchResult : SD Board

51

<Symptom> Abnormal Color, White Balance NG

<Photo of Symptom>






Model : 42inchResult : D Board





Blue Abnormal ColorGreen

CyanRedRed

MagentaMagentaYellow

52

<Symptom> Sync Error

<Photo of Symptom>










53


<Photo of Symptom>

Picture Problem (Right half or Left half)









54


<Photo of Symptom>

Picture Problem (Upper or Bottom)




Model : 42 inchResult : SU Board



Model : 42 inch Result : SS Board

Model : 42 inch Result : SU Board

55

Self-check Procedure

56

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.

Self-check Screen

CHASSIS: GPH11DAll models

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.

NOTE: This procedure does

not reset the TV

Reset Procedure

57

CHASSIS: GPH11DAll models

Note: All customer programmed parameters will be erased.

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.

Documents

Panas