E - 3 2
TROUBLESHOOTING GUIDE
Change IC4001
YES
YES
YES
NO
NO
NO
Are there waveform
at pin 20,23 of IC8503 ?
Is the voltage at pin 3
of CP8502 about 5V ?
Change IC8503
Check IC8004
and peripheral circuit
Are there waveform
at pin 136,139 and 141
of IC4001 ?
YES
Check IC2001
and peripheral circuit.
NO
Check IC8503
and peripheral circuit.
DVD/CD ANALOG AUDIO DOES
NOT APPEAR
Are there waveform
at line of DVDDATA0-7?