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2008 Troubleshooting-Guide Standard-HD 080424
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Transcript of 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 3 times 10
LED blinks 4 times 11
LED blinks 5 times (Quick Troubleshooting) 12
LED blinks 5 times 13
LED blinks 6 times 14
SU/SD Board Isolation Procedure 15
LED blinks 7 times 16
LED blinks 8 times 17
LED blinks 9 times 18
LED blinks 10 times before pressing the power button 19-20
LED blinks 10 times after pressing the power button 21-22
LED blinks 12 times 23
LED blinks 13 times 24
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?
LED blinks 3 times<Trouble Mode and Defective Board>
Trouble Mode
3.3V down SOS
Defective Board
A Board
<How to find the defective boards>
Replace the A board
Warning: Disconnect AC Power prior to making any disconnection or
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
<How to find the defective boards>
Yes No
Warning: Disconnect AC Power prior to making any disconnection or
connection.
11Note: CN = Connector
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
<How to find the defective boards>
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
Note: CN = Connector
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.
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
Note: CN = Connector
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.
Is pin 5 of CN P25 shortedto GND?
DisconnectCN P25.
Is pin 5 of the socket P25 shorted
to GND?
Disconnect CB1-CB4.
Is pin 5 of CN P25 shortedto GND?
Disconnect A31 and
connect A32.Is pin 5 of CN P25 shortedto GND?
Disconnect CB5~CCB8
Is pin 5 of CN P25 shortedto GND?
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
Note: CN = Connector
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.
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.(*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?
Does the TV shut down and the power
LEDblink 7 times?
Does the TV shut down and the power
LEDblink 7 times?
Does the TV shut down and the power
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.
LED blinks 8 timesTrouble Mode
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
LED blinks 9 times<Trouble Mode and Defective Board>
Trouble Mode
Panel Status
Defective Board
D Board
<How to find the defective boards>
Replace the A board.
Warning: Disconnect AC Power prior to making any disconnection or
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
Defective Board (Possibility)
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
Note: CN = Connector
Go to the Next slide (B)
Go to the Next slide (A)
ReplaceThe SS board
ReplaceThe SC board
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.(*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?
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.(*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?
LED blinks 12 timesTrouble Mode
Sound SOS
Defective Board (Possibility)
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
LED blinks 13 times<Trouble Mode and Defective Board>
Trouble Mode
Communication error with IC8001
Defective Board
A Board
<How to find the defective boards>
The A board is defective
Warning: Disconnect AC Power prior to making any disconnection or
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
Defective Board (Possibility)
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.
Warning: Disconnect AC Power prior to making any disconnection or
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
Warning: Disconnect AC Power prior to making any disconnection or
connection.
28Note: CN = Connector
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
Warning: Disconnect AC Power prior to making any disconnection or
connection.
29
Yes
Check the cable between connector A7 on the A board
and P6 on the P board.
Note: CN = Connector
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
This page is purposely left blank.
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)>
Diagnosis for Picture Problem (All Over the Screen)
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)>
Diagnosis for Picture Problem (All Over the Screen)
<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>
<Models>50inch (HD Panel)
1 Trouble at Upper right :
2 Trouble at Upper middle :
C1 board or Panel defect
3
C2 board or Panel defect
C3 board or Panel defect
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)>
<Models>42inch (HD 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
Model : 42 inch Result : SC Board
Model : 42 inchResult : SC Board
Model : 42 inch Result : SC Board
44
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inchResult : A Board
Model : 42 inchResult :A Board
Model : 42 inch Result : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : SC Board
Model : 42 inchResult : SD Board
Model : 42 inchResult : SD Board
45
<Symptom> Abnormal Color, White Balance NG
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inch Result : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inch Result : A Board
Model : 42inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inch Result : A Board
Blue Abnormal ColorGreen
CyanRedRed
MagentaMagentaYellow
46
<Symptom> Sync Error
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inch Result : A Board
Model : 42 inchResult : A Board
47
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (Right half or Left half)
Model : 50 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inch Result : A Board
Model : 42 inchResult : A Board
48
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (Upper or Bottom)
Model : 42 inchResult : A Board
Model : 42 inchResult : A Board
Model : 42 inch Result : A Board
Model : 42 inchResult : SU Board
Model : 42 inchResult : A Board
Model : 42 inch Result : SC 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