Troubleshooting Guide; Check Of The Iic Bus Lines; Screen Display; Check Point - Panasonic TC-L42E30 Service Manual

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
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.
7.1.2. Exit
Disconnect the AC cord from wall outlet.
7.1.3.

Screen display

7.1.4.

Check Point

Confirm the following parts if NG was displayed.
DISPLAY Check Ref. No.
PEAKS IC8000
TUN TU4800B
AVSW IC3001
STBY IC8000
MEM1 IC8902
MEM2 IC8901
ZWEI
ID
Description Check Point
PEAKS A-Board
TUNER A-Board
AV SWITCH A-Board
PEAKS (STM) A-Board
EEPROM (PEAKS) A-Board
EEPROM (STM) A-Board
ZWEI2 LCD PANEL
ID
15