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 4 times 13
LED blinks 5 times (Quick Troubleshooting) 14
LED blinks 5 times 15 - 18
LED blinks 6 times 19
SU/SD Board Isolation Procedure 20
LED blinks 7 times 21
LED blinks 8 times 23
LED blinks 9 times 24
LED blinks 10 times before pressing the power button 25 - 27
LED blinks 10 times after pressing the power button 28 - 29
LED blinks 11 times 30
LED blinks 12 times 31
LED blinks 13 times 32
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
LED blinks 2 timesTrouble Mode
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
Reconnect P12 and measure the resistance between pin 1 of connector P7 and ground (Chassis)
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)
Warning: Disconnect AC Power prior to making any disconnection or connection
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
Reconnect P7 and measure the resistance between pin 1 of connector P7 and ground (Chassis)
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
LED blinks 3 timesTrouble Mode
3.3V down SOS
Defective Board
D Board
Replace the D board
12
Warning: Disconnect AC Power prior to making any disconnection or connection
LED blinks 4 timesTrouble Mode
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?
Warning: Disconnect AC Power prior to making any disconnection or connection
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:
LED blinks 5 timesTrouble Mode
5V SOS
Defective Board
P, D, Cs, SC, SD, SS, D board or Panel
14
Warning: Disconnect AC Power prior to making any disconnection or connection
5 blinks condition can be caused by:
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
LED blinks 5 timesTrouble Mode
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).
Yes NoIs there a short to ground?
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)
Yes NoIs there a short to ground?
Replacethe SS board
Warning: Disconnect AC Power prior to making any disconnection or connection
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).
Yes NoIs there a short to ground?
Replacethe D board
Reconnect D31 and D32 only. Measure the resistance between pin 5 of connector P25 on the P board and
ground (Chassis).
Yes NoIs there a short to ground?
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).
Yes NoIs there a short to ground?
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).
Yes NoIs there a short to ground?
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 NoIs there a short to ground?
Reconnect D32 and D33 and disconnect C26 on the C2 board. Also disconnect the Flex cables between the panel and the C2 board (CB7~CB11). Measure the resistance
between pin 5 of connector P25 on the P board and ground (Chassis).
Replacethe C1 board
Replacethe Panel
Yes NoIs there a short to ground?
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).
Yes NoIs there a short to ground?
Replacethe C3 board
Replacethe Panel
LED blinks 6 timesTrouble Mode
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?
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?
21
LED blinks 7 timesTrouble Mode
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
LED blinks 8 timesTrouble Mode
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
Warning: Disconnect AC Power prior to making any disconnection or connection
LED blinks 9 timesTrouble Mode
Panel Status
Defective Board
D Board
Replace the D board.
24
Warning: Disconnect AC Power prior to making any disconnection or connection
The power LED blinks 10 times at plug-in
25
Trouble Mode
Dead/No power
Defective Board (Possibility)
P, A, GS, K, GH• Missing/Shorted F_STB_15V
• Missing/Shorted SUB9V, SUB5V, and SUB3.3V
• Wrong diagnostic by the A board
10 blinks condition can be caused by:
A board Connectors LocationSub-Voltages Distribution Diagram
Figure 11 Figure 12
The power LED blinks 10 times at plug-in
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
Defective Board (Possibility)
P, A, GS, K, GH
Do the AC relaysclick after the TV is plugged
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.
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
Unplug the TV and disconnect connector A1 on the A board. Plug in the TV
The power LED blinks 10 times at plug-in
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
LED blinks 11 timesTrouble Mode
Fan SOS
Defective Board (Possibility)
Fans, PB, A Board
29
Warning: Disconnect AC Power prior to making any disconnection or connection
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
LED blinks 11 timesTrouble 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.
No Yes
ReplaceThe PB board
Does the power LED stay on
when the TV is turned on?
Replace the Fan.
30
Unplug the TV and disconnect connector PB30 on the PB board. Plug in the TV and turn it on.
Warning: Disconnect AC Power prior to making any disconnection or connection
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
when the TV is turned on?
ReplaceThe A board
LED blinks 12 timesTrouble 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
No Yes
ReplaceThe A board
Does the power LED stay on
when the TV is turned on?
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
TH-46PZ850UTH-50PZ850U
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
Do the AC relaysclick after the TV is plugged
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
Defective Board (Possibility)
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
the TV is plugged intothe AC line?
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-46PZ850UTH-50PZ850U
TH-42PZ80/85UTH-46PZ80/85UTH-50PZ80/85UTH-42PZ800UTH-46PZ800UTH-50PZ800U
Reconnect A52 and disconnect connector A51. Plug in the TV.
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
Reconnect A9 and disconnect connector A51. Plug in the TV.
ReplaceThe G board
TH-42PZ800UTH-46PZ800UTH-50PZ800U
TH-46PZ850UTH-50PZ850U
Do the ACrelays click after
the TV is plugged intothe AC line?
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
Warning: Disconnect AC Power prior to making any disconnection or connection
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
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)>
Diagnosis for Picture Problem (All Over the Screen)
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)>
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
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>
<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
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)>
<Models>42inch (HD 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
Model : 42 inch Result : SC Board
Model : 42 inchResult : SC Board
Model : 42 inch Result : SC Board
50
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inchResult : D Board
Model : 42 inchResult :D Board
Model : 42 inch Result : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : SC Board
Model : 42 inchResult : SD Board
Model : 42 inchResult : SD Board
51
<Symptom> Abnormal Color, White Balance NG
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inch Result : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inch Result : D Board
Model : 42inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inch Result : D Board
Blue Abnormal ColorGreen
CyanRedRed
MagentaMagentaYellow
52
<Symptom> Sync Error
<Photo of Symptom>
Picture Problem (All over the screen)
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inch Result : D Board
Model : 42 inchResult : D Board
53
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (Right half or Left half)
Model : 50 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inch Result : D Board
Model : 42 inchResult : D Board
54
<Symptom> Vertical Line
<Photo of Symptom>
Picture Problem (Upper or Bottom)
Model : 42 inchResult : D Board
Model : 42 inchResult : D Board
Model : 42 inch Result : D Board
Model : 42 inchResult : SU Board
Model : 42 inchResult : D Board
Model : 42 inch Result : SC 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.