TROUBLESHOOTING GUIDE
E-39
D-VR4SU/D-VR4SC
NO AUDIO ON PLAYBACK
Is there AUDIO signal at pin 7
and 8 of IC7301 ?
No
No
Check IC7301 and peripheral
circuit.
Yes
Yes
Check IC8306 and peripheral
circuit.
Is there waveform at pin
1 and 7 of IC8306 ?
Check J8005 and peripheral
circuit.
No
Yes
Check IC701 and peripheral
circuit.
Is there waveform at pin
78 and 80 of IC701 ?