Panasonic TH-50PX20U/P, Service Manual

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7 Self-check Function
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 occurrence and 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 “ACTION” button in the control panel of the unit simultaneously with the “POWER” 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. Description Board
MEMORY IC002 EEPROM for Main MPU DG
SOUND IC2401 Sound Control H
YUV_SW IC4301 YUV switch H
GC2M1 IC4501 Global Core 2 for main DG
GC2S1 IC4502 Global Core 2 for sub DG
EXDAC2 IC5011 EXDAC DV
TNR1 TNR201 Tuner 1 TA
MTS IC4205 Multiplex sound H
EXDAC IC8031 External I/O DG
GC2M2 IC4501 Global Core 2 for main DG
GC2S2 IC4502 Global Core 2 for sub DG
PANEL - - - - - Panel - - - - -
TNR2 TNR251 Tuner 2 TB
AVSW IC4302 AV switch H
CONV IC3801 Convert Micom DG
SND2 IC4203 BBE H
HDMI IC5003 HDMI Recelver DV
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TH-50PX20U-P