Panasonic Viera Link TH-42PZ80U Guida rapida
Model : TH-42PZ80U
TH-46PZ80U
TH-50PZ80U
TH-42PZ85U
TH-46PZ85U
TH-50PZ85U
TH-42PZ800U
TH-46PZ800U
TH-50PZ800U
TH-46PZ850U
TH-50PZ850U
Technical Guide
Technical Guide
Plasma
Plasma
(GPH11DU Chassis)
(GPH11DU Chassis)
HD Models
HD Models
Troubleshooting Handbook
Troubleshooting Handbook
Panasonic Technology and Service Company
National 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 time
Trouble 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= On
SS LED = ON
Replace the D
board Replace the A
board
No Yes
Warning: Disconnect AC Power prior to
making any disconnection or connection
TH-42PZ80/85/800U
TH-46PZ80/85/800U
TH-50PZ80/85/800U
TH-46PZ850U
TH-50PZ850U
Disconnect A9 on the A
Board. Plug in the TV
and turn it on
A board Connectors Location
LED blinks 2 times
Trouble 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 times
Trouble 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?
YesNo
Plug in the TV and turn it on. Measure
the voltage at pin 1 of connector P7
Is there
15V
present?
No Yes
Replace
The P board Replace
The 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
Replace
The P board
Reconnect P12 and measure the
resistance between pin 1 of
connector P7 and ground (Chassis)
Is there a
short
circuit?
No Yes
Replace
The 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
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