2008 troubleshooting-guide standard-hd 080424

Model : THModel : TH--42PX80U42PX80UTHTH--50PX80U50PX80U

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 PageNo Picture\No OSD 28

No Sound 29

Troubleshooting for Picture Problems 31

Diagnostic Method for Troubleshooting PDP Television

32

Troubleshooting for Picture Trouble 33

Diagnosis for Picture Problem (All Over the Screen) 34~36

Diagnosis of Vertical Line Problem 37

Picture Trouble at Upper or Lower half 38

Picture Trouble at Right or Left half (50 Inch) 39

Picture Trouble at Right or Left half (42/37 Inch) 40

Picture Trouble in 50 Inch Models 41

Picture Trouble all Over the Screen 42

Examples of Symptoms and Remedies 44~49

Self-check Procedure 50

Reset 51

Driver Setup Adjustment 52~53

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



LED blinks 5 times (Quick Troubleshooting) 12



SU/SD Board Isolation Procedure 15




LED blinks 10 times before pressing the power button 19-20

LED blinks 10 times after pressing the power button 21-22



Dead part I 25-26

No Picture from one or all inputs (OSD and Sound OK) 27

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-42PX80U)

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 OperationOnce

3.0sec (interval) Light

No Light

LED Blinking

timesContents Check Point

2345

6

8

<Check point>

1

9

7

12

10

15V line abnormality3.3V line abnormality Power Supply abnormality5V line abnormality Scan Driver (1) abnormality/DRV_RST

Sustain Driver abnormality

STB5V sense time out

Panel Status abnormality

Scan Driver (2) abnormality

Voltage for sound abnormality

REG. voltage abnormality

A Board (15V SOS)A Board (3.3V SOS)P Board (Power SOS)A Board (5V SOS)SC,SU,SD Board (SC Energy recovery circuit)C and A Boards Connections

SS Board (SS Energy recovery circuit)/Panel

A Board

A Board (Panel Status DET)

SC,SU,SD Board (SC Floating voltage area)

A Board (Sound SOS), C boards connectionsA Board (A SOS, Tuner SOS)/SC/SS

<LED Blinking timing>

7

13 Communication error with IC8001 A Board

LED blinks 1 time<Trouble Mode and Defective Board>

Trouble Mode

Communication Error

Defective Board

A, GS

Disconnect GS52 on the SD Card Slot Board (GS board ) (See Figure 1). Plug in the TV and turn it on

Warning: Disconnect AC Power prior to making any disconnection or

connection.

Replace the GS board

No Yes

Replace the A board

8

Figure 1

Is the power LED still blinking?

LED blinks 2 times<Trouble Mode and Defective Board>

Trouble Mode15V down SOS

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

SC Board

A Board

No

SS Board

Yes

9

A Board

Yes No

P Board

Is pin 1 or 2 of the CN P25 shorted to GND?

Yes

Yes

Note: CN = Connector

No

No

Warning: Disconnect AC Power prior to making any disconnection or connection(*1) = The reference number of the sustain data connector is different in some of the models:TH-42PX80U = SS23TH-50PX80U = SS23

(*2) CAUTION: Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by VSUS.

Unplug the TV,Re-connect CN

P12, SS11, SS34, and SS23 (*1). Turn the TV on.

Is there 15V output at CN P25 pin 1 or 2before the TV shuts down ?

Unplug the TV.Disconnect CN P25.

Unplug the TV and disconnect CN SC20 and SC2. To isolate the SC board. Re-connect the TV and turn the power on.

Unplug the TV, reconnect SC20 and (*2) SC2 and disconnect CN P12 from the P board and SS11 and SS23 (*1) from the SS board to isolate the SS board. Remove the jumper at CN SS34 and install it across pin 8 and 10 of connector P12. Plug in the TV and turn the power on.

Does the power

LED stay on?

Does the power

LED stay on?

Is pin 1 or 2 of the CN

P25 shorted to GND?


Trouble Mode

3.3V down SOS

Defective Board

A Board

<How to find the defective boards>

Replace the A board


connection.

10Note: CN = Connector

LED blinks 4 times (TH-42PX80U)<Trouble Mode and Defective Board>

Trouble Mode

Power Supply SOS

Defective Board

Primarily P board or possible A board


Yes No


connection.


A BoardP Board

Turn the TV on.

Is pin12 of CN P25

on the P board high

before the TV shuts down?

LED blinks 5 times (Quick Troubleshooting)<Trouble Mode and Defective Board>

Trouble Mode

5V SOS

Defective Board

P, C, SC, SS board or Panel (DDIC)*1


Disconnect CN P12 of the power supply board. Measure the resistance of pin 1 of the lead

cable to ground.

Yes

12

Proceed to more extensive troubleshooting of the slides that follow.

No



(*2) CAUTION: Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by VSUS.

Is there a short to ground?

Panel

LED blinks 5 times (TH-42PX80U)Trouble Mode

5V SOS

Defective Board

P, C, SC, SS board or Panel

No

No

Yes No Yes No

A Board

Yes No

C1 Board Panel

Yes No

Yes No

C2 Board Panel

SS BoardYes

SC Board

P Board

Yes

No

P Board

13

Yes


Disconnect CN SC20 on the SC board. Plug in the TV and turn it on

Does the power

LED stay on?

Does the power

LED stay on?

ConnectCN SC20. DisconnectCN SS23 (*1) on the SS board. Plug in the

TV and turn it on

Connect SS23 (*1).Disconnect CN 31and A32 on the A

board. With the TV disconnected measure continuity between pin 5 of CN

P25 and GND

Is pin 5 of CN P25 shortedto GND?

Connect A31and leave A32 disconnected.


DisconnectCN P25.

Is pin 5 of the socket P25 shorted

to GND?

Disconnect CB1-CB4.


Disconnect A31 and

connect A32.Is pin 5 of CN P25 shortedto GND?

Disconnect CB5~CCB8


Connect SC20 and disconnectCN SC46.

Does the power

LED stay on?

SD Board(See SD board

Isolation procedure on slide

15)

Yes No

LED blinks 6 timesTrouble Mode

SC Energy Recovery SOS

Defective Board (Possibility)

SC, A, P Board (SC >A> P )

Yes No

14

No


Clean and reseat the ribbon cables between the A and the C boards. Also reseat the cables

between the C boards. If problem persists, replace the A

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.


(*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 Pboard output

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

P Board

SC 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 2 and 3.

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.

15Figure 2

Figure 3

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 A board.

Reconnect the SD board only. (See instructions on slide 15).Plug in the TV and turn it on.

Physically disconnect the SU board and the SD board. (See instructions on slide 15).

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 slide 15). 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?

16

LED blinks 7 times (TH-42PX80U)Trouble Mode

SC Floating voltage SOS

Defective Board (possibility)

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

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


SS Energy recovery SOS/Panel

Defective Board (possibility)

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

P BoardNo No

Yes

17

Panel

Yes No

DisconnectCN SS23 from the SS board. Plug in the TV

and turn it on

Does the TV power

up andstay on?

Is the anode of D280 on

the SS board high?

Figure 4

A Board

SS Board


Trouble Mode

Panel Status

Defective Board

D Board


Replace the A board.


connection.

18

The power LED blinks 10 times at plug-in (TH-42PX80U)

Is there 3.2V at

pin 6 of connector P7 when the TV is plugged into

the AC line?

ReconnectA1 and disconnect

connector A51on the A board.Do the AC relays click after

the TV is plugged intothe AC line?

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

NO

NO

NO Yes

Yes

Yes

ReplaceThe P boardDisconnect

connector A1 on the A board.Do the AC relays click after

the TV is plugged intothe AC line?

ReplaceThe A board

If cable between connectors GS52 and A51 is OK, Replace the GS board.

19

Trouble Mode

Dead/No power


P, A, GS, K

Do the AC relaysclick after the TV is plugged

into the AC line?

NOWarning: Disconnect AC Power prior to making any disconnection or connection.

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.

The power LED blinks 10 times at plug-in (TH-42PX80U)Warning: Disconnect AC Power prior to making any

disconnection or connection.

Yes

Is there 15V at pin 7of connector P6/A7 when the TV

is plugged into theAC line?

Continue from the previous slide

Is there 15V at

pin 7 of connector P6/A7 whenthe TV is plugged into

the AC line?

No

Yes

Does the power LED still blink 10 times?

Replace the K board.

No

No

Yes

YesDoes the TV shut down?

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.

20

Disconnect connector P6 on the P board. Plug

in the TV

No

ReplaceThe P board

Disconnect connector A1 on

the A board.Plug in the TV

Reconnect connector A1 and

disconnect connector A51on the A board.

Plug in the TV

LED blinks 10 times after pressing the power button (TH-42PX80U)Trouble 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

21

Unplug the TV and re-connect CN SS11 (*2), SS23 and CN SS34 on the SS board and CN P12 on the P board. Disconnect CN A51 and A52 on the A board. Plug in the TV and turn it on.

YesNo

Unplug the TV and re-connect CN SC2(*2), and SC20 on the SC board. Disconnect CN SS11(*2), SS23, and SS34 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


Go to the Next slide (B)

Go to the Next slide (A)

ReplaceThe SS board

ReplaceThe SC board


(*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?

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

LED blinks 10 times before pressing the power button (TH-42PX80U)Warning: Disconnect AC Power prior to making any

disconnection or connection.

ReplaceThe P board

Continue from the previous slide (B)

No Yes

No Yes

ReplaceThe A board

Continue from the previous slide (A)

Unplug the TV and re-connect CN A52 on the A board (Do not connect CN A1 yet). Plug in the TV and turn it on.

ReplaceThe G boardReplace

The GS board

Unplug the TV and re-connect CN A52 and A1 on the A board. (*5) 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.

Note: CN = Connector22

Are any of these

voltages missing?


(*2) CAUTION: Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by VSUS.(*3) Make adjustments according to the value provided on the label normally found above the SC board or the SS board(*4) Place a jumper across pin 8 and 10 of connector P12. The unit will not enter the standby mode without the jumper.(*5) = When measuring Vsus and Vda, make sure to place the meter’s probe on the pin indicated before turning the TV on. This way, a voltage reading can be obtained before the TV shuts down.

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


Sound SOS


Speakers, A Board

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.

No Yes

ReplaceThe A board

Does the power LED stay on

when the TV is turned on?

Check the speakers andthe speaker’s wires.

If the speakers and the wiresare ok, check P15V (Pin 1 of P25) and follow 2 blinks instructions

23


Trouble Mode

Communication error with IC8001

Defective Board

A Board


The A board is defective


connection.

24

No Power/Dead Unit

Do the AC relaysclick after the TV is plugged

into the AC line?

Doespin 6 of connector

A1 momentarily go from4.5V to 0V when the

power button is pressed?

Is there 5V at pin 5 of connector A7/P7

when 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

25

Trouble Mode

Dead/No power


P, A, GS, K

Is there continuity between pins 8 and 10 of connector P12

of the P board?

Place your meter on pin 11 of connector

A25 or P25.

Is there 3.2V when the power

button is pressed?

Unplug the TV

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

Yes

Unplug the TV and disconnect connector A7. Place your meter on pin 5 of connector P7. Plug in the TV and turn

it on.

No Power/Dead Unit (Continue)

Is there 3.3V 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?

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 the TV is plugged into

the AC line?

ReplaceThe A board

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

26

Unplug the TV and disconnect

connector A1. Plug in the TV.

Reconnect A1 and disconnect connector A52.

Plug in the TV.

No Picture from one or all inputs (OSD and Sound OK)

Note: Slow leakage from the panel causes “no raster and buzz noise”

Yes

NoYes No

NoYes

Disconnectthe SU Board from the

SC board. Turn the unit on. Is there a picture at the

lower half of thescreen?

NoYesConnect the

SU board. Disconnectthe SD Board from the SC board.

Turn the unit on. Is there apicture at the upper half

of the screen?.

SCand possibly

Panel.


connection.

27

No

ReplaceThe A board

Does a white picture

appears?

ReplaceThe A board

DisconnectCN A5, Plug in the TV and turn it on

ReplaceThe SD board

ReplaceThe SU board

Is there nopicture from all

inputs?

No Picture\No OSD

No

No

Yes

NoYes

Yes No

Yes

YesNo


connection.


Is the On Screen Display

information visible?

ReplaceThe A board

ReplaceThe A board

Unplug the TV from the wall outlet.Disconnect connector A5 from the A board.Reconnect the TV and wait for it to come on by itself.

Is the screen completely

white?Is there 75V (VDA) at pins 1 and 2 of the connector SS12?

ReplaceThe P boardIs the SC Board LED

illuminated?

ReplaceThe SC board

Is the SS Board LED illuminated?

ReplaceThe A board

ReplaceThe SS board

No Sound

NoYes

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

No


connection.

29

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 A7

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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30

Troubleshooting for Picture Problems

31

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”.

32

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 A, or SC)

SD Board (or A, or SC)

SC Board (or A)

Right half

Left half

Left or Right half(from front view)

A Board (or C1, or Panel)

A Board (or C2, or Panel)

Some part of the screen

33

<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

A Board, SC Board, SU Board, SD Board

e.g. TH-42PX80U

34

LVDS

<Diagnosis (2)>


IC9900

DATADRIVER

IC9500 APICTUREOUTPUT

S.F. PROCESSOR

PLASMA AI

DISCHARGECONTROL

LVDSRECEIVER

<Back side view>

SU

SD

SC SS

Buffer IC Buffer IC

Sustain Control PulseScan Control Pulse

A Board defect

Waveform OK

SC,SU,SD Board defect

Waveform NG

Up to SC Board

Refer to “Diagnosis (3)”on next page

<Result>

<Cause>

Confirm the waveform at “TPSC1” of the SC board

<Defective Area>

Video DATA (R)

Video DATA (L)

TPSC1

Panel Drive Circuit

Correct Waveform

Sample of NG Waveform

Here

<Result>

<Cause>

35

<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

36

C1Buffer

C2Buffer

Diagnosis of Vertical Line Problem

A number of blocksnot lighting

Thin vertical lineor 1 block not lighting

A 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 A 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

orA boardA Board

case1

C1Buffer IC Buffer IC

IC IC IC IC

37

Picture Trouble at Upper or Lower half

(Front view)

SC

SU

SD

SS

C1C2

1

2 A

<Symptom>

<Defective board>

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

1

2

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

<NG Area>

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

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

SymptomResult

SymptomResult

SymptomResult

: Horizontal line (Lower side): SD board

: Horizontal line (Upper side): A board

: Horizontal line (Both area): SS board

38

<Models>42 inch (HD Panel)

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

No Picture, Picture noise, etc.

Trouble at Left half : A-board defect

12

Trouble at Right half : A-board defect

SymptomResult

: Cyan noise (Right side): A board

<Actual Symptom><Symptom>

<Defective board>

<NG Area>

<Models>50inch (HD Panel)

SC

SU

SD

SS

C1C3

SS2

SS3C2

A12

(Front view)

39

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

A12

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

1

2

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

SymptomResult

: Vertical line: Panel

<Actual Symptom><Symptom>

<Defective board>

<NG Area>

42 inch (HD Panel)

40

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

A12

(Front view)<Defective board>

3

Trouble at Upper left :

41

Picture Trouble all Over the Screen<Symptom>

(Front view)

SU

SD

SS

C1C2

1

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

SymptomResult

SymptomResult

SymptomResult

: Vertical line (All over screen): A board

: White balance NG: A board

: Abnormal Picture: SC board

ASC

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

<Symptom>

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


<Defective board>

42

Examples of Symptoms and Remedies

43

<Symptom> Noise Picture

<Photo of Symptom>

Picture Problem (All over the screen)

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

Model : 42 inch Result : A Board

Model : 42 inchResult : A Board

Model : 42 inch Result : SC Board

Model : 42 inchResult : SC Board




44

<Symptom> Vertical Line

<Photo of Symptom>



Model : 42 inchResult :A Board






Model : 42 inchResult : SD Board

Model : 42 inchResult : SD Board

45

<Symptom> Abnormal Color, White Balance NG

<Photo of Symptom>






Model : 42inchResult : A Board





Blue Abnormal ColorGreen

CyanRedRed

MagentaMagentaYellow

46

<Symptom> Sync Error

<Photo of Symptom>










47


<Photo of Symptom>

Picture Problem (Right half or Left half)









48


<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

49

Self-check Procedure

50

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

51

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.

TH-42PX80U Driver Setup Adjustment

52

Driver Setup TableItem / Preparation1. Input a white signal to plasma video input.2. Set the picture controls as follows.

Picture menu: VividNormal: SetAspect: Full

Caution1. First perform Vsus adjustment.

2. Confirm the voltage level of VSCN. This should be done after the adjustment of Vad which should be - 105VWhen Vad=-149V, Voltage of Vscn is -4V ±4V.

Note: See the panel label for voltages that are not listed in the service manual

Test point Volume Level

T2 TPSC1 (SC) VR16602 (SC 210 ±

10V

1. Input a 100% White signal to the unit.2. Set the picture controls as follows:

Picture menu : VividNormal : SetAspect : Full

3. Connect an Oscilloscope to test point TPSC1. Check the voltage (T2) at 100ms period on the down slop.

Initialization Pulse Adjustment

Panel Label

AdjustmentVoltage

TH-50PX80U Driver Setup Adjustment

53

Driver Setup TableItem / Preparation1. Input a white signal to plasma video input.2. Set the picture controls as follows.

Picture menu: VividNormal: SetAspect: Full

Caution1. First perform Vsus adjustment.

2. Confirm the voltage level of VSCN. This should be done after the adjustment of Vad which should be - 105VWhen Vad=-149V, Voltage of Vscn is -4V ±4V.

Note: See the panel label for voltages that are not listed in the service manual

Test point Volume Level

T2 TPSC1 (SC) VR16602 (SC 210 ±

10V

1. Input a 100% White signal to the unit.2. Set the picture controls as follows:

Picture menu : VividNormal : SetAspect : Full

3. Connect an Oscilloscope to test point TPSC1. Check the voltage (T2) at 100ms period on the down slop.

Initialization Pulse Adjustment

Panel Label

AdjustmentVoltage

2008 troubleshooting-guide standard-hd 080424

Documents

sc board

sosp board power sosa

boardled blinks

picture trouble

voltage abnormalitya

power problem

power button

times quick troubleshooting