7 Self-check FunctionWhen symptoms like “the power fails sometimes” or “sometimes there is no picture and/or sound” can not be confirmed at thetime 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 +Bline.7.1. Self-check of the microcomputer control system (bus line)Indicaton methodPress the “ACTION” button in the control panel of the unit simultaneously with the “POWER” button in the control panel of theunit. Hold them few seconds.Return to he normal screenPress any button on the unit or in the remote control.Screen DisplayDisplay Ref. No. Description BoardMEMORY IC002 EEPROM for Main MPU DGSOUND IC2401 Sound Control HYUV_SW IC4301 YUV switch HGC2M1 IC4501 Global Core 2 for main DGGC2S1 IC4502 Global Core 2 for sub DGEXDAC2 IC5011 EXDAC DVTNR1 TNR201 Tuner 1 TAMTS IC4205 Multiplex sound HEXDAC IC8031 External I/O DGGC2M2 IC4501 Global Core 2 for main DGGC2S2 IC4502 Global Core 2 for sub DGPANEL - - - - - Panel - - - - -TNR2 TNR251 Tuner 2 TBAVSW IC4302 AV switch HCONV IC3801 Convert Micom DGSND2 IC4203 BBE HHDMI IC5003 HDMI Recelver DV15TH-42PX20U-P
