Panasonic TX-P42ST60B / TX-P42ST60Y / TX-PR42ST60 (serv.man2) Service Manual ▷ View online
17
7 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
2. Power LED Blinking timing
7.1.
Check of the IIC bus lines
7.1.1.
How to access
7.1.1.1.
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
for more than 3 seconds.
7.1.1.2.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote
control for more than 3 seconds.
control for more than 3 seconds.
7.1.2.
Screen display
7.1.3.
Check Point
Confirm the following parts if NG was displayed.
7.1.4.
Exit
Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on
automatically.
automatically.
DISPLAY
Check Ref. No.
Description
Check Point
H14TUN
TU6705
TUNER
A-BOARD
H90STBY
IC8000
PARAGON (STM)
A-BOARD
H91MEM2
IC8900
NAND FLASH
A-BOARD
H38PANEL
PLASMA PANEL
A-BOARD/PLASMA PANEL
H38PD6
IC9300
PD6H
A-BOARD
H07TEMP
IC2001
TEMP SENSOR
A-BOARD
H17LAN
LAN
A-BOARD
H00FE
IC6803
DEMODULATOR
A-BOARD
H96ID
ID
A-BOARD
H97ID2
ID2
A-BOARD
H45BT
BLUETOOTH
A-BOARD/BLUETOOTH
H42WiFi
WiFi
A-BOARD/WiFi
H21DSP
IC4900
AUDIO AMP
A-BOARD
18
7.2.
Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
Blinking Times
Contents
Check point
1
Panel information SOS
PD Start SOS
PD Start SOS
-
2
P15V SOS
A-Board
P-Board
P-Board
6
Driver SOS1
(SN Energy recovery circuit)
(A-SN FPC DET)
(SN Energy recovery circuit)
(A-SN FPC DET)
SN-Board
A-SN FPC
7
Driver SOS2
(SN Connector DET)
(SN Scan and Logic IC)
(SN Connector DET)
(SN Scan and Logic IC)
SN-Board
8
Driver SOS3
(SS FPC DET)
(SS Energy recovery circuit)
(SS FPC DET)
(SS Energy recovery circuit)
SS-Board
SS2-Board
SS FPC
SS2 FPC
9
Discharge Control SOS
A-Board
10
Sub 3.3V SOS
Tuner power SOS
Tuner power SOS
A-Board
SN-Board
SS-Board
SS-Board
P-Board
12
Sound SOS
A-Board
Speaker
Speaker
Woofer
13
Emergency SOS
A-Board
19
7.3.
No Power
First check point
There are following 3 states of No Power indication by power LED.
There are following 3 states of No Power indication by power LED.
1. No lit
2. Green is lit then turns red blinking a few seconds later. (See Power LED Blinking timing chart)
3. Only red is lit.
2. Green is lit then turns red blinking a few seconds later. (See Power LED Blinking timing chart)
3. Only red is lit.
7.4.
No Picture
7.4.1.
Drive circuits LED indicator
Check that the following LEDs on the SN and SS-Board.
Power recovery LED
LED for check
SN
D16583
SS
D16254A
20
7.5.
Local screen failure
Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.
Fig-1
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