Panasonic DLP PT-52DL52 Service Manual page 30

When symptoms like "the power fails sometimes" or "sometimes there is no picture and/or
sound" can not be confirmed at the time of servicing, the self-check function can be used to
confirm the occurrenceand to find the defective circuit.
In case of "power failure", flashing of the "POWER" indication (red) at the front of the unit can be
used to narrow down the +B line.
7.1. Self-check of the microcomputer control system (bus line)
Indicaton method
Press the Power "ACTION" button in the control panel of the unit simultaneously with the
"VOLUME DOWN" button in the control panel of the unit. Hold them few seconds.
Return to he normal screen
Press any button on the unit or in the remote control.
Screen Display
Display Ref. No.
MEMORY IC1142
SOUND IC2451
YUV_SW IC2501
DG_EEP IC1004
GC2M1 IC9007
GC2S1 IC9012
DG_JLC IC9066
TNR1 TNR001
MTS IC2201
AVSW IC3001
HAD IC9044
GC2M2 IC9007
GC2S2 IC9012
AMDP2 IC9039
TNR2 TNR002
JLC IC2506
Description
EEPROM for Main MPU
Sound Control
YUV switch
EEPROM for DG MPU
Global Core 2 for main
Global Core 2 for sub
External I/O
Tuner 1
Multiplex sound
AV switch 1
HD A/D conversion
Global Core 2 for main
Global Core 2 for sub
AMDP
Tuner 2
External I/O
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Board
DG
H
H
DG
DG
DG
DG
A
A
A
DG
DG
DG
DG
A
H