Panasonic TH-L55WT50M, Service Manual, Page: 18 / 84

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7 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
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.
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.
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 switch off the power with [ Power ] button on the main unit.
DISPLAY Check Ref. No. Description Check Point
TUN TU6705 TUNER A-BOARD
STBY IC8000 PEAKS-PR
O
4(STM) A-BOARD
MEM1 IC8902 PEAKS EEPROM A-BOARD
MEM2 IC8900 NAND FLASH A-BOARD
AVSW IC3001 AV SW A-BOARD
LAN IC86
0
0 ETHERPHY A-BOARD
ZWEI ZWEI LCD PANEL
ID2 ID2 A-BOARD
BT IC8000, A21 BLUETOOTH A-BOARD/BLUETOOTH
WiFi IC8000, A20 WiFi A-BOARD/WiFi