Panasonic TH-37PX60U Quick start guide

Technical Guide
9th Generation Plasma Display
Troubleshooting Handbook
TH-37/42/50/58PX60 TH-42/50/58/65PX600
TH--42PD60U42
Panasonic Service and Technology Company
National Training

Table of Contents
3
Subject Page
Troubleshooting Shutdown Problems 5
Power LED’s Response to Shutdown Operation 6
LED blinks 1 time 7
LED blinks 2 times (TH-37PX60, TH-42PD60U, TH-42PX60U \ 600U) 8
LED blinks 2 times (TH-50PX60U\600U, TH-58PX60U\600U, TH-
65PX600U) 9
LED blinks 3 times 10
LED blinks 4 times 11
LED blinks 5 times (Quick Troubleshooting) 12
LED blinks 5 times (TH-37PX60U, TH-42PX60U and TH 42PX600U) 13
LED blinks 5 times (TH-50PX60U and TH 50PX600U) 14
LED blinks 5 times (TH-58PX60U and TH 58PX600U) 16
LED blinks 5 times (TH-65PX600U) 18
LED blinks 6 times 20
LED blinks 7 times (All Models Except TH-58PX60/600U) 21
LED blinks 7 times (TH-58PX60/600U) 22
LED blinks 8 times 23
LED blinks 9 times 24
LED blinks 10 times before pressing the power button 25
LED blinks 10 times after pressing the power button 26
LED blinks 11 times 26
LED blinks 12 times (TH42PD60U, TH-37/42/50PX60U) (TH-
65PX600U) 28
Subject Page
LED blinks 12 times (TH42/50/58PX600U) 29
Dead 30
No Picture from one or all inputs (OSD and Sound OK) 31
No Picture\No OSD 32
No Sound (TH-42PX600U) 33
Troubleshooting for Picture Problems 36
Diagnostic Method for Troubleshooting PDP Television 36
Diagnosis by Test Pattern When OSD is Available 37
Diagnosis by Removing the D5 Connector 38
Troubleshooting for Picture Trouble 39
Diagnosis for Picture Problem (All Over the Screen) 40
Diagnosis of Vertical Line Problem 44
Picture Trouble at Upper or Lower half 45
Picture Trouble at Right or Left half (50 Inch) 46
Picture Trouble at Right or Left half (42/37 Inch) 47
Picture Trouble in 50 Inch Models 48
Picture Trouble all Over the Screen 49
Examples of Symptoms and Remedies 50
Reset and Self-check Procedure 57
Driver Setup Adjustment 58
Board Layout and Part Numbers 63
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

1. Troubleshooting Shutdown Problems
5
Power LED’s Response to Shutdown Operation
Once
3.0sec (interval) Light
No Light
LED
Blinking
times Contents Check Point
2
3
4
5
6
8
<Check point>
1
9
7
11
12
10
15V line abnormality
3.3V line abnormality
Power Supply abnormality
5V line abnormality
Scan Driver (1) abnormality
Sustain Driver abnormality
Communication error
Panel Status abnormality
Scan Driver (2) abnormality
FAN abnormality
Voltage for sound abnormality
REG. voltage abnormality
D Board (15V SOS)
D Board (3.3V SOS)
P Board (Power SOS)
D Board (5V SOS)
SC,SU,SD Board (SC Energy recovery circuit)
SS Board (SS Energy recovery circuit)
D Board
D,DG Board (Panel Status DET)
SC,SU,SD Board (SC Floating voltage area)
FAN
PA Board (Sound SOS)
PA, Board (PA SOS, Tuner SOS)
20 Communication error DT,DG Board
<LED Blinking timing>
6

LED blinks 1 time
<Trouble Mode and Defective Board>
Trouble Mode
Communication Error
Defective Board
D Board
<How to find the defective boards>
In this case, the defective board is D board only.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
7
LED blinks 2 times (TH-37PX60, TH-42PD60U, TH-42PX60U\600U)
<Trouble Mode and Defective Board>
Trouble Mode
15V down SOS
Defective Board (Possibility)
P, D, PA, SC, SS Board (P > PA, D, SC, SS)
<How to find the defective boards>
Turn the unit on.
Is there 15V output
at CN P25 pin 1 or 2 before
Shutdown ?
DBoard SC Board
DBoard
Yes
No
No
PBoard
PA Board
Power SW OFF.
Disconnect CN P25. Is pin 1
or 2 of the socket P25 shorted
to GND?
No
Yes
No
Yes
Turn the unit on.
Does the power LED
blink 2 times?
With the power SW OFF, disconnect
CN SC23, SC20, and SC2. To isolate
the SC board.
With the power SW OFF, disconnect CN P12, SS11, and SS23 (*1)to
isolate the SS board. Remove the jumper at CN SS34 and install it
across pin 8 and 10 of connector P12.
SS Board
No
Turn the unit on.
Does the power LED
blink 2 times?
Yes
With the power SW OFF, disconnect
CN P5. To isolate the PA board
board.
Turn the unit on.
Does the power
LED blink 2 times? The
power LED may blink 12
times.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
(*1) = Th reference number of
the sustain data connector is
different in some of the models:
TH-42PX600U = SS23
8

LED blinks 2 times (TH-50PX60U\600U, TH-58PX60U\600U, TH-65PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
15V down SOS
Defective Board (Possibility)
P, D, PA, SC, SS Board (P > PA, D, SC, SS)
<How to find the defective boards>
Turn the unit on.
Is there 15V output
at CN P25 pin 1 or 2 before
Shutdown ?
DBoard SC Board
DBoard
Yes
No
No
PBoard
PA Board
Power SW OFF.
Disconnect CN P25. Check
pin 1 or 2 of the socket for a
Short to GND?
No
Yes
No
Yes
Turn the unit on.
Does the power LED
blink 2 times?
With the power SW OFF, disconnect
CN SC23, SC20, and SC2. To isolate
the SC board.
With the power SW OFF, disconnect CN P12, SS11, and SS43
(*1). to isolate the SS board. Remove the jumper at CN SS34
and install it across pin 8 and 10 of connector P12.
SS Board
No
Turn the unit on.
Does the power LED
blink 2 times?
Yes
With the power SW OFF, disconnect
CN P5. To isolate the PA board
board.
Turn the unit on.
Does the power
LED blink 2 times? The
power LED may blink 12
times.
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-50PX60U = SS43
TH-50PX600U = SS43
TH-58PX60U = SS44
TH-58PX600U = SS44
TH-65PX600U = SS44
9
LED blinks 3 times
<Trouble Mode and Defective Board>
Trouble Mode
3.3V down SOS
Defective Board
D Board
<How to find the defective boards>
In this case, the defective board is D board only.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
10

LED blinks 4 times
<Trouble Mode and Defective Board>
Trouble Mode
Power Supply SOS
Defective Board
Primarily P board or possible D board
<How to find the defective boards>
DBoard
Turn the unit on.
Is pin 16 of CN P25 of
the P board high
before shutdown?
P Board
Yes
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
11
LED blinks 5 times (Quick Troubleshooting)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
Is the resistance of pin 1 of
the lead cable P12 zero
ohm?
Disconnect CN P12
of the power supply board. Measure the
resistance of pin 1 of the lead cable to ground.
Yes
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
(*1) = Data Driver IC
12
Proceed to more extensive troubleshooting of
the pages that follow.
Panel
No

LED blinks 5 times (TH-37PX60U, TH-42PX60U and TH 42PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
No No
Disconnect
CN D31, D32
Is pin 7 of CN P25 shorted
to GND?
Connect D31.
Disconnect D32.
Is pin 7 of CN P25 shorted
to GND??
Yes
No
Yes
No
DBoard Disconnect CB1-CB4.
Is pin 7 of CN P25 shorted
to GND?
Yes
No
C1 Board Panel
Disconnect D31.
Connect D32.
Is pin 7 CN P25 shorted
to GND?
Yes
No
Disconnect CB5-CB8.
Is pin 7 of CN P25 shorted
to GND?
Yes
No
C2 Board Panel
Connect CN SC20.
Disconnect CN SS23
Turn on the unit. Does it
power up?
SS Board
Yes
Connect CN P25.
Disconnect CN SC20
Turn on the unit. Does it
power up?
SC Board
Yes
Disconnect CN P25.
Is pin 7 of the socket P25
shorted to GND?
PBoard
Yes
No
Go Back
to the start.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
13
LED blinks 5 times (TH-50PX60U and TH 50PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
No No
Yes
Disconnect
CN D31, D32, D33, and D34.
Is pin 7 of CN P25 shorted
to GND?
No
DBoard
Connect
CN SC20. Disconnect CN SS43 (*1)
Turn on the unit. Does it
power up?
SS Board
Yes
Connect
CN P25. Disconnect CN
SC20 Turn on the unit. Does
it power up?
SC Board
Yes
Disconnect CN P25.
Is pin 7 of the socket P25
shorted to GND?
PBoard
Yes
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
14
Connect D31. Disconnect
CN D32, D33, and D34. Is pin 7 of CN
P25 shorted to GND?
No
No
Panel
No
Connect
CN C10 of the C1
board. Disconnect CA1-CA3.
Is pin 7 of CN P25 shorted
to GND?
Yes
C1 Board
Disconnect
CN C10 of the C1 board. Is pin 7 of CN P25
shorted to GND?
Yes
Yes
Panel
Connect CN C10. Disconnect
CA4-CA7. Is pin 7 of CN P25 shorted
to GND? Yes
C2 Board
See step 1 of next
page.
No
(*1) = The reference number of
the sustain data connector is
different in some of the models:
TH-50PX60U = SS43
TH-50PX600U = SS43

LED blinks 5 times (TH-50PX60U and TH 50PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
15
Connect D32.
Disconnect CN D31, D33,
and D34. Is pin 7 of CN
P25 shorted
to GND?
No
No
Disconnect
CA8-CA11. Is pin 7 of
CN P25 shorted to
GND?
Yes
Yes
C3 Board
Panel
Connect D33.
Disconnect CN D31, D32,
and D34. Is pin 7 of CN
P25 shorted
to GND?
No
No
Disconnect
CB8-CB11. Is pin 7 of
CN P25 shorted to
GND?
Yes
Yes
C4 Board
Panel
Connect D34.
Disconnect CN D31, D32,
and D33. Is pin 7 of CN
P25 shorted
to GND?
No
Panel
Yes
C6 Board
Yes
Yes
No Connect
CN C60 of the C6
board. Disconnect CB1-
CB3. Is pin 7 of CN P25
shorted
to GND?
No
Disconnect CN C60 of
the C6 board. Is pin 7 of CN
P25 shorted to GND?
Panel
Disconnect
CB4-CB7. Is pin 7 of CN P25
shorted to GND?
Yes
C5 Board
Go back
to the start of
the flowchart.
No
Step 1
of previous page
LED blinks 5 times (TH-58PX60U and TH 58PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
No No
Yes
Disconnect
CN D31, D32, D33, and D34.
Is pin 7 of CN P25 shorted
to GND?
No
DBoard
Connect
CN SC20. Disconnect CN SS44
Turn on the unit. Does it
power up?
SS Board
Yes
Connect
CN P25. Disconnect CN
SC20 Turn on the unit. Does
it power up?
SC Board
Yes
Disconnect CN P25.
Is pin 7 of the socket P25
shorted to GND?
PBoard
Yes
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
16
Connect D31. Disconnect
CN D32, D33, and D34. Is pin 7 of CN
P25 shorted to GND?
No
No
Panel
No
Connect
CN C10 of the C1
board. Disconnect CA1-CA4.
Is pin 7 of CN P25 shorted
to GND?
Yes
C1 Board
Disconnect CN C10
of the C1 board. Is pin 7 of CN P25 shorted
to GND?
Yes
Yes
Panel
Connect
CN C10. Disconnect CN CA5-CA8
and C23 of the C2 board. Is pin 7 of CN
P25 shorted to GND?
Yes
C2 Board
See step 1 of next
page.
No

LED blinks 5 times (TH-58PX60U and TH 58PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
17
Connect D32.
Disconnect CN D31,
D33, D34 and C10 of the C1
board. Is pin 7 of CN
P25 shorted
to GND?
No
No
Disconnect
CA9-CA11. Is pin 7 of
CN P25 shorted to
GND?
Yes
Yes
C3 Board
Panel
Step 1 from previous page
No
No
Panel
No
Connect
CN C60 of the
C6 board. Disconnect
CB1-CB4. Is pin 7 of CN
P25 shorted
to GND?
Yes
C6 Board
Panel
Connect D34.
Disconnect CN D31,
D32, and D33. Is pin 7
of CN P25 shorted
to GND?
Disconnect
CN C60 of the C6 board.
Is pin 7 of CN P25
shorted to
GND?
Yes
Yes
Connect
CN C60.
Disconnect CN
CB5-CB8 and C43 of the
C4 board. Is pin 7 of CN
P25 shorted
to GND?
Yes
C5 Board
No
Connect D33.
Disconnect CN D31,
D32, D34 and C60 of the C1
board. Is pin 7 of CN
P25 shorted
to GND?
Disconnect
CB9-CB11. Is pin 7 of
CN P25 shorted to
GND?
Yes
Yes
C4 Board
Go back
to the
start of
the
flowchart.
No
Panel
No
LED blinks 5 times (TH-65PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
No No
Yes
Disconnect
CN D31, D32, D33,
D34,D35 and D36.
Is pin 7 of CN P25
Shorted to
GND?
No
DBoard
Connect
CN SC20. Disconnect CN SS44
Turn on the unit. Does it
power up?
SS Board
Yes
Connect
CN P25. Disconnect CN
SC20 Turn on the unit. Does
it power up?
SC Board
Yes
Disconnect CN P25.
Is pin 7 of the socket P25
shorted to GND?
PBoard
Yes
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
18
Connect
CN D32. Disconnect
D31, D33, D34, D35, and D36. Is
pin 7 of CN P25 shorted
to GND?
No
No
Disconnect
CN C31of the C3 board. Is pin
7 of CN P25 shorted
to GND?
Yes
Yes
Panel
Connect CN C31.
Disconnect CN CA6-CA10
of the C2 board. Is pin 7
of CN P25 shorted
to GND? Yes
C2 Board
See step 1 of
next page.
No
Connect
CN D31.Disconnect
CN D32, D33, D34, D35
and D36. Is pin 7 of CN
P25 shorted
to GND??
Yes
No
Disconnect
CA1-CA5. Is pin 7 of
CN P25 shorted
to GND?
Yes
No
C1 Board Panel

LED blinks 5 times Continued (TH-65PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
5V SOS
Defective Board
D, P, C, SC, SS board or Panel (DDIC)*1
<How to find the defective boards>
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
19
No
Connect
CN C31 of the C3
board and D33 of the C2 Board.
Disconnect CN D31, D32, D34,
D35, and D36. Is pin 7 of
CN P25 shorted
to GND?
Yes
.
Disconnect
CN CA11-CA16
of the C3 board. Is pin 7
of CN P25 shorted
to GND? Yes
C3 Board Panel
Connect
CN D35. Disconnect
D31, D32, D33, D34, and
D36. Is pin 7 of CN P25
shorted to GND?
No
No
Disconnect
CN C41of the C4 board.
Is pin 7 of CN P25
shorted to GND?
Yes
Yes
Panel
Connect CN C31.
Disconnect CN CB6-CB10
of the C5 board. Is pin 7
of CN P25 shorted
to GND?
Yes
C5 Board
No
Connect
CN D36.Disconnect
CN D31 D32, D33, D34,
and D35. Is pin 7 of CN
P25 shorted
to GND??
Yes
No
Disconnect
CB1-CB5 of the C6
board. Is pin 7 of CN
P25 shorted
to GND?
Yes
No
C6 Board Panel
Step 1 from previous page.
Connect
CN C41 of the C4
board and D34 of the
C5 Board. Disconnect
CN D31, D32, D33, D35,
and D36. Is pin 7 of
CN P25 shorted
to GND?
Yes
Disconnect
CN CB11-CB16
of the C4 board. Is pin 7
of CN P25 shorted
to GND?
Yes
C4 Board
Panel
LED blinks 6 times
<Trouble Mode and Defective Board>
Trouble Mode
SC Energy Recovery SOS
Defective Board (Possibility)
SC, SS, D, P Board (SC > SS, D, P )
<How to find the defective boards>
DBoard
PBoard
Turn the TV on.
Does VSUS(*1)
voltage appear at pin 1
of CN P2 before
shutdown?
SC Board Yes
No
Yes
No
(*1) VSUS about 180V (Accurate voltage is provided on the Panel Label)
CAUTION: Before connecting P2 or P11, discharge is necessary to prevent
potential shock caused by VSUS.
(*2) Place a jumper across pin 8 and 10 of connector P12. The unit will not enter the
standby mode without the jumper.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Disconnect
the connectors SC2,
SC23, and SC20 from
the SC board. Turn the
TV on. Does the TV
power up and
stay on?
SS Board
Yes
Disconnect
the connectors P11,
P12(*2), and SS23 (*3)
from the SS board. Turn
the TV on. Does the
TV power up
and stay on?
No
20
(*3) = The reference number of the sustain
data connector is different in some of the
models:
TH-37PX60U = SS23
TH-42PD60U = SS23
TH-42PX60U = SS23
TH-42PX600U = SS23
TH-50PX60U = SS43
TH-50PX600U = SS44
TH-58PX60U = SS44
TH-58PX600U = SS44
TH-65PX600U = SS44
Yes
No
Are the
ribbon cables
that connect the
D board to the C
boards properly
seated?
Reseat
the ribbon
cables. Turn the
unit on. Does it
power up and
stay on?
End
Yes
No

LED blinks 7 times (all models except TH-58PX60/600U)
<Trouble Mode and Defective Board>
<How to find the defective boards>
Trouble Mode
SC Floating voltage SOS
Defective Board (possibility)
SC, SU, SD, P board (SC,SU,SD>D,P)
SS Board
PBoard
Disconnect
the connectors SC2,
SC23, and SC20 from
the SC board. Turn the
TV on. Does the TV
power up and
stay on?
Turn the TV on.
Does 15Vdc appear
at pin 1 of CN P23 on the
P board before the unit
shuts down?
Turn the TV on.
Does VSUS(*1)
voltage appear at pin 1 of
CN P2 of the P board
before shutdown?
Connect
the connectors SC2(*2),
SC23, and SC20 to the
SC board. Remove the SU
board. Turn the TV on.
Does the TV power up
and stay on?
SU Board
Yes
No
Yes
No
Yes
No
Yes
No
Make sure the connectors P2/SC2, P23/SC23 SC20/D20 located are not loose and seated properly.
Note: CN = Connector
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Install
the SU board and
Remove the SD board.
Turn the TV on. Does
it power up
and stay on?
SD Board
Yes
No
PBoard
Replace the SC
board. Turn the TV
on. Does the TV
power up and
stay on?
End
DBoard
Yes
No
(*1) VSUS about 180V
(Accurate voltage is
provided on the Panel
Label)
(*2) CAUTION:
Before connecting
P2/SC2 or P11/SS11,
discharge is necessary
to prevent potential
shock caused by
VSUS.
21
LED blinks 7 times (TH-58PX60/600U)
<Trouble Mode and Defective Board>
<How to find the defective boards>
Trouble Mode
SC Floating voltage SOS
Defective Board (possibility)
SC, SU, SD, P board (SC,SU,SD>D,P)
SS Board
PBoard
Disconnect
the connectors SC2,
SC23, and SC20 from
the SC board. Turn the
TV on. Does the TV
power up and
stay on?
Turn the TV on.
Does 15Vdc appear
at pin 1 of CN P23 on the
P board before the unit
shuts down?
Turn the
TV on. Does
VSUS(*1) voltage appear
at pin 1 of CN P2 of the P
board before
shutdown?
Connect
the connectors SC2(*2),
SC23, and SC20 to the
SC board. Remove the SU
board. Turn the TV on.
Does the TV power up
and stay on?
SU Board
Yes
No
Yes
No
Yes
No
Yes
No
Make sure the connectors P2/SC2, P23/SC23 SC20/D20 located are not loose and seated properly.
Note: CN = Connector
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Install
the SU board and
Remove the SD board.
Turn the TV on. Does
it power up
and stay on?
SD Board
Yes
No
PBoard
Replace the SC
board. Turn the TV
on. Does the TV
power up and
stay on?
End
D
Board
Yes
No
(*1) VSUS about 180V (Accurate
voltage is provided on the Panel
Label)
(*2) CAUTION: Before connecting
P2/SC2 or P11/SS11, discharge is
necessary to prevent potential
shock caused by VSUS.
(*3) If the power LED continues to
blink after replacing the SS board,
change the D board.
Disconnect
the connectors
P11(*1), P12 and SS44
(*2) from the SS board.
Turn the TV on. Does the
TV power up and
stay on?
No
Yes
No
SS Board (*3)
22

LED blinks 8 times
<Trouble Mode and Defective Board>
<How to find the defective boards>
Trouble Mode
SS Energy recovery SOS
Defective Board (possibility)
SS, SC, D, P board (SS>SC,D,P)
(*1) Place a jumper across pin 8 and 10 of connector P12. The unit will not enter the
standby mode without the jumper.
(*3) VSUS about 180V (Accurate voltage is written on the Panel Label of the chassis)
CAUTION : To avoid potential shock from the VSUS voltage, discharge the
connectors SC2 or SS11 before reconnecting them into their respective socket.
(*4) If the power LED continues to blink after replacing the SS board, change the D
board.
SC Board
PBoard
Turn the TV on.
Is the VSUS(*3) input at
pin 1 of CN P11 present
before Shutdown?
No No
Yes
No
DBoard
SS Board (*4)
Yes
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Disconnect
the connectors P11,
P12 (*1), and SS23 (*2)
from the SS board. Turn
the TV on. Does the TV
power up and stay on?
Disconnect
the connectors SC2,
SC23, and SC20 from
the SC board. Turn the
TV on. Does the TV
power up and
stay on?
23
(*2) = The reference number of the sustain
data connector is different in some of the
models:
TH-37PX60U = SS23
TH-42PD60U = SS23
TH-42PX60U = SS23
TH-42PX600U = SS23
TH-50PX60U = SS43
TH-50PX600U = SS43
TH-58PX60U = SS44
TH-58PX600U = SS44
TH-65PX600U = SS44
Yes
LED blinks 9 times
<Trouble Mode and Defective Board>
Trouble Mode
Panel Status
Defective Board
D Board
<How to find the defective boards>
In this case, the defective board is D board only.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
24

LED blinks 10 times before pressing the power button
<Trouble Mode and Defective Board>
Trouble Mode
Tuner/ PA SOS
Defective Board
PA, P, H, DG, DT Board
<How to find the defective board(s)>
Disconnect connector PA40 of the PA
board and plug the TV into the AC line. Figure
PA board
Connector PA40
Does the
power LED
stop blinking?
No
Yes HBoard
Remove the DT board and
plug the TV into the AC line.
Does the
power LED
stop blinking?
No
Yes DT Board
Note: When the DT board is removed,
the unit will power up with all functions
disabled due to a lack of data
communication.
1. Disconnect connector P10 on the P board. (Make sure the TV is
unplugged).
2. Because you only have 2 to 3 seconds to measure the F_STB_
14V, place your meter’s probe at pin 1 of connector P10 on the
P board before plugging the TV to the AC line.
3. Plug the TV to the AC line while still holding the probe at pin 1.
Does the 14V
come up?
No
Yes
Since it may be
difficult to determine
whether the PA or the
DG board is
defective, it’s OK to
order both the DG
and PA boards
together.
PBoard
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
25
LED blinks 10 times after pressing the power button
<Trouble Mode and Defective Board>
Trouble Mode
Tuner/ PA SOS
Defective Board
PA, P, H, DG, SC, SS Board
<How to find the defective board(s)>
Disconnect connector DG3 of the DG
board and plug the TV into the AC line.
Observe the SC and SS board LEDs.
Do the AC
Relays click and remain on?
Are the SC and SS board LEDs
on?
No
Yes
Connect connector DG3 of the DG board.
Disconnect connector PA40 of the PA
board and plug the TV into the AC line and
turn the unit on.
Does the
power LED
stop blinking?
No
Yes HBoard
Since it may be difficult to determine
whether the PA or the DG board is
defective), it’s OK to order both the
DG and PA boards together.
Disconnect CN SC2(*1),
SC23 and SC20 of the SC
board. Turn the unit on.
Does the power
LED blink 10
times?
SC Board
Yes
No
Disconnect CN SS11(*1), SS12 (*2)
and SS23 (*2) of the SS board. Turn
the unit on.
Does
the power LED
blink 10 times?
SS Board
No
PBoard
Yes
Warning: Disconnect AC Power prior to making any disconnection or connection.
(*1)To avoid potential shock from the VSUS voltage, discharge the connectors SC2 or
SS11 before reconnecting them into their respective socket .
(*2) Place a jumper across pin 8 and 10 of connector P12. The unit will not enter the
standby mode without the jumper.
(*2) = The reference number of the sustain
data connector is different in some of the
models:
TH-37PX60U = SS23
TH-42PD60U = SS23
TH-42PX60U = SS23
TH-42PX600U = SS23
TH-50PX60U = SS43
TH-50PX600U = SS44
TH-58PX60U = SS44
TH-58PX600U = SS44
TH-65PX600U = SS44
26

LED blinks 11 times
<Trouble Mode and Defective Board>
Trouble Mode
Fan SOS
Defective Board (Possibility)
Fan, PA Board
<How to find the defective boards>
Make sure that all the fan connectors, connector PA5 on the PA
board and connector P5 on the P board are connected properly.
PA Board
Is the cathode
of D5805 (D5817 TH-65-
PX600U)of the PA board high
before shutdown?
Replace the DG board.
Do not disconnect the fans.
Is the voltage at pin 3 of any of the fan
connectors high before shutdown?
Replace the fan that outputs a high at
pin 3 of its connector.
No
Yes
YesNo
Is the anode of D5804
of the PA board high
before shutdown?
Replace the
PA board.
Replace the
DG board.
Yes
No Warning: Disconnect AC Power prior to
making any disconnection or
connection.
27
Note: If this condition arises
after replacing the PA board,
confirm the presence of a
jumper across the empty fan
connector.
LED blinks 12 times (TH42PD60U, TH-37/42/50PX60U) (TH-65PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
Sound SOS
Defective Board (Possibility)
Speakers, PA Board
<How to find the defective boards>
Make sure that the connector P5 on the P board and connector PA5 on
the PB board are seated properly.
Disconnect the connector PA2 of
the PA board and turn the unit on.
Check the speakers.
Yes
No
Does the
power LED blink 12
times?
Disconnect connector DG3 and PA5 of the
DG and PA boards and plug the TV into
the AC line and observe the SC and SS
board LEDs.
Do the AC
relays click and
remain on? Are the
SC and SS board
LEDs on?
No
Yes
PA Board
Reconnect CN DG3 and PA5.
Disconnect CN SC2(*1),
SC23 and SC20 of the SC
board. Turn the unit on.
Does the power
LED blink 12
times?
SC Board
Yes
No
Disconnect CN SS11(*1),
SS12 (*2) and SS23 (*3)
of the SS board. Turn the
unit on.
Does
the power LED
blink 12 times?
SS Board
No
Do pins 1
and 2 of CN P25
output 15V before
the unit shuts
down?
PBoard
Yes
No
DBoard
Yes
Warning: Disconnect AC Power
prior to making any disconnection
or connection.
(*3) = The reference number of the sustain
data connector is different in some of the
models:
TH-37PX60U = SS23
TH-42PD60U = SS23
TH-42PX60U = SS23
TH-50PX60U = SS43
TH-58PX60U = SS44
TH-65PX600U = SS44
(*2) = Remove the jumper at CN SS34 and
install it across pin 8 and 10 of connector P12.
28
(*1) = To avoid potential shock from the VSUS voltage, discharge the
connectors SC2 or SS11 before reconnecting them into their respective socket.
Is the
voltage at
pin 35 of
CN PA20
High?
Yes
No
DG
Board

LED blinks 12 times (TH42/50/58PX600U)
<Trouble Mode and Defective Board>
Trouble Mode
Sound SOS
Defective Board (Possibility)
Fan, PA Board
<How to find the defective boards>
Make sure that the connector P5 on the P board and connector PA5 on
the PB board are seated properly.
Disconnect the connector PA1 of
the PA board and apply power.
Does the power
LED blink 12
times?
Check the right speakers.
Yes
Disconnect the connector PA2 of
the PA board and turn the unit on.
Check
the left
speakers.
Yes
No
Does the
power LED blink 12
times?
Disconnect connector DG3 of the DG
board and plug the TV into the AC line and
observe the SC and SS board LEDs.
Do the AC
relays click and
remain on? Are the
SC and SS board
LEDs on?
No
No
Connect CN DG3 and PA5.
Disconnect CN SC2(*1),
SC23 and SC20 of the SC
board. Turn the unit on.
Does the power
LED blink 12
times?
SC Board
Yes
No SS Board
No Do pins 1
and 2 of CN P25
output 15V before
the unit shuts
down?
PBoard
Yes
No
DBoard
Yes
Warning:
Disconnect AC
Power prior to
making any
disconnection
or connection.
(*1) = See (*1) of
the previous page.
(*3) = The reference
number of the sustain
data connector is
different in some of the
models:
TH-42PX600U = SS23
TH-50PX600U = SS44
TH-58PX600U = SS44
(*2) = Remove the jumper
at CN SS34 and install it
across pin 8 and 10 of
connector P12.
Yes
29
PA Board
Is the
voltage at
pin 35 of
CN PA20
High?
Yes
No
DG
Board
Disconnect
CN SS11(*1), SS12 (*2)
and SS23 (*3) of the SS
board. Turn the unit on.
Does the power LED
blink 12
times?
No Power
Wait for approx. 30 seconds after applying AC to the unit,
then push the power button.
Yes
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
30
Do the AC
relays click after plugging the TV
into the AC line?
Is there 5V
at pin 1 of CN PA40 on the PA
board or pin 1 of
CN HC22?
Do the AC relays click?
Is there 3.3V
at pin 1 of CN HC01 on the
HC board?
Replace the Pboard.
YesNo
Yes
Is there 2.5V
at pin 17 of CN P25 on the
Pboard?
Replace the Dboard.
No
Yes Replace the
Pboard.
Is there 2.5V
at pin 13 of CN P25 on the P
board?
Yes
No
Replace the
Pboard.
No
Unplug
the TV and disconnect
CN H2. Plug the TV into
the AC outlet. Do the
relays click?
Yes
Unplug
the TV and connect
CN H2. Disconnect
CN H51. Plug the TV into
the AC outlet. Do the
relays click?
Replace the DG board.
No
No
No
Replace the
Hboard. If connections between the H, K, G, and GK boards are OK, replace the Kand GK boards.
Yes

No Picture from one or all inputs (OSD and Sound OK)
No Picture from one or all inputs (Sound OK)
<How to determine the defective board>
<Models>
All models
Note: Slow leakage from the
panel causes “no raster and
buzz noise”
<Symptom>
No
Yes
PX600 series Only
No
Yes
DG (1)or D (2) Board
Analog
TV NG
Only Digital
TV NG
Is there no
picture from all
inputs?
When Multi window mode,
Right picture NG DG Board
Disconnect
CN DG5, Turn the unit
on. Does a white picture
appears? (*)
No
Yes
DBoard
Panel discharge
occurs?
No
Yes
SU Board
Disconnect
the SU Board from the
SC board. Turn the unit on. Is
there a picture at the
lower half of the
screen?
No
Yes
SD Board
Connect the
SU board. Disconnect
the SD Board from the SC board.
Turn the unit on. Is there a
picture at the upper half
of the screen.
SC or DBoard
and possibly
Panel
Only HDMI
Input NG
No
Yes
DG Board
No
Yes
DT Board
HBoard
No
Yes
DG Board
DT Board
DG Board
AV
Input is normally
displayed ?
Program Out
is normal?
Program Out
is normal?
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
31
No Picture\No OSD
No Picture at all
<Models>
All Models)
<Symptom>
<How to determine the defective board>
No
No
Yes
Is the On Screen Display
information visible?
No
Yes
Is the SC Board LED
illuminated?
Yes
Is the
SS Board LED
illuminated?
No
Yes
SC Board
SS Board
DBoard
HBoard
Is there video from
HDMI input?
Is there 75V (VDA) at pins 1 and
2 of the connector SS12?
PBoard
Is the screen completely white? Yes
DG (1) or D (2) Board
No
DG Board
No
Yes
1. Unplug the unit from the wall outlet.
2. Disconnect the connector DG5 from the DG board.
3. Reconnect the unit to the wall outlet and turn it on.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
32

No Sound (TH-42PX600U)
No Audio
<How to determine the defective board>
<Models>
50inch (HD Panel), 42/37inch (HD/SD Panel)
<Symptom>
Is there a sound
waveform at pin 13
and 14 of IC2307
located on the PA
board?
No Reseat the
connectors
H1/DG1 and
PA20/DG20.
Yes
Is there a
waveform at pin
1 of connector
PA1 (R-Ch) or
PA2 (L-CH)
Yes
Are the
connectors
H1/DG1 and
PA20/DG20
properly
seated?
Check the speakers.
Is sound
restored?
Yes
Problem solved
No
Replace the Hboard.
Change the PA board
No Replace
the PA
board.
No Is pin 16 of
IC2300 of
the PA board
high?
No
Yes
Change the DG board.
Is the base
of Q2313 of
the PA board
high?
No
Yes Warning: Disconnect AC Power prior to
making any disconnection or
connection.
33
This page is purposely left blank.
34

Troubleshooting for Picture Problems
35
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”.
36

<Purpose>
Picture problem such as “Picture Noise and or Vertical Line”displayedall over the screen is mainly caused
by a defective D or DG board. The “internal Test Pattern Generator” can help determine whether to replace the D
or DG board. The test patterns are created by the D board. Follow the steps below to confirm the operation of the
D or DG boards.
Diagnosis by Test Pattern When OSD is Available
<How to enter the Test Pattern>
1. While pressing "VOLUME-" button of the TV set,
press "RECALL" button of the remote control three
times within 2 seconds.
2. Push button "1" of the Remote Control several times
to select the "OPTION" setting.
3. Press the "OK" button of the Remote control for three
seconds or more to display the test pattern.
4. To display a specific pattern, press the OK button.
DG Board (or D board)
D Board
Defective Board
Normal
Abnormal
Pattern
<Test Pattern (Normal)>
<Diagnosis>
<Model>
All Models White (by DG)
Scroll
White (by D)
A and B zone
Red
Color bar
Green
1% window
Blue
Ramp red
on/off AgingRamp white
Ramp blue
Ramp green
<Test Pattern (Abnormal)>
Example Picture
<Symptom>
Picture Noise, Full Vertical Line
37
Diagnosis by Removing the D5 Connector
IC9500 PICTURE
OUTPUT
IC9900
S.F. PROCESSOR DATA
DRIVER To C Board
LVDS
RECEIVER
White Picture
D
LVDS
DG
MICRO
PROCESSOR
IC4037 LVDS
TRANS
MITTER
IC1103
GC5
PLASMA AI
VIDEO DATA
D
5
DG
5
<Purpose>
Symptom such as “No picture, No OSD, Sound OK” is mainly caused by a defective DG or D board. The internal
pattern generator cannot be accessed due to the loss of OSD. This method makes it possible to determine
whether the DG board or the D (SC,SS) is defective.
<Block Diagram and Explanation>
1. This white pattern is generated by IC9900 on D board.
2. When the unit is turned on after disconnecting connector D5, a white picture is provided to the panel drive circuit.
If the panel drive section of the unit is ok, a white picture is automatically displayed by the PDP.
D board (SC or SS)
DG Board (D board)
Defective Board
No Picture
White Picture
Pattern
<Diagnosis>
Power ON after removing D5 Connector
<Symptom>
No picture (Sound OK)
<Position of D5 Connector>
<Model>
2006 Models ONLY
DG5
38