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TROUBLESHOOTING GUIDE
E-34
Change IC8504
Change IC4001
YES
YES
YES
NO
NO
NO
No digital audio on playback
Is there waveform
at pin 3 of IC8504 ?
Are there audio signals at
pin 1,4 of IC8504 ?
Is there audio waveform
at pin 131 of IC4001 ?
Check OS8001 and peripheral
circuit of J8007
Check peripheral circuit of
IC8504