Self-Check Function; How To Access; Screen Display - Panasonic TC-20LB30 Service Manual

4 Self-check function

When phenomena like "the power fails from time to time" or "the video/audio fails from time to time" can not be confirmed at the
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also,
when "the power fails from time to time", display on the screen can be used to confirm the occurrence and to limit the scope for
the defective circuits.
Any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.
4.1.

How to access

4.1.1. Access
Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote
controller unit simultaneously.
4.1.2. Exit
When one of the buttons for channel selection etc. is pressed, the display returns to the normal screen.
4.2.

Screen display

Display
TNR
SOUND
AVSW
MTS
GLP
GC3
TEMP
MEMORY
JPEG
Ref .No.
TU001 Tuner
IC2320 Sound control
IC3001 AV Switch
IC2201 Multi Sound Processor
IC4014 LCD Processor
IC4012 Global Core
IC1008 Temperature Sensor
IC1002 EEPROM
IC6513 MCU (JPEG)
5
Description
TA-Board
A-Board
A-Board
TA-Board
A-Board
A-Board
A-Board
A-Board
JG-Board
P.C.B.
TC-20LB30