Troubleshooting Guide; Check Of The Iic Bus Lines - Panasonic TC-L42U30 Service Manual

6 Troubleshooting Guide

Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1.

Check of the IIC bus lines

6.1.1. How to access
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.
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 con-
trol for more than 3 seconds.
6.1.2. Exit
Disconnect the AC cord from wall outlet.
6.1.3. Screen display
6.1.4. Check Point
Confirm the following parts if NG was displayed.
DISPLAY Check Ref. No.
DTVSOC IC8001
SYSMPU IC8001
TUN TU8302
MEM1 IC8503
MEM2 IC8004
AMP IC2106
ZWEI2 IC9006
EPOP
Description Check Point
Nile-TCON A-Board
MPU (Nile-TCON) A-Board
TUNER A-Board
EEPROM (Nile-TCON) A-Board
EEPROM (SYSMPU) A-Board
AUDIO AMP A-Board
ZWEI2 TC-Board
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