Panasonic TX-23LX50A, Service Manual

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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 [OFF TIMER] 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 Ref No. Description P.C.B
E2 IC1101 EEPROM A-Board
DPS IC1700 LCD DRIVER A-Board
VSP IC1500 Video Signal Processor A-Board
Tun TU100 Tuner A-Board
MSP IC2501 Multi Sound Processor A-Board
6
TX-23LX50M / TX-23LX50A / TX-23LX50X