8-4
FL12.0ATR
[Audio Signal Section]
SP3801, SP3802 or CL3801 may be defective.
Check and replace these parts.
Audio is not outputted normally.
FLOW CHART NO.1
Are the audio signals outputted to Pin(1, 4) of CN3801?
Replace Digital Main CBA Unit.
No
Yes
Is approxi13V voltage supplied to Pin(10, 11)
of CN631?
Is approxi3.3V voltage supplied to Pin(13) of
CN631?
No
No
Yes
Is approxi21V voltage supplied to
Pin(1, 2, 7, 8) of CN631?
See FLOW CHART NO.5 <P-ON+21V is not output.
[Power Supply Section]>
See FLOW CHART NO.7 <AL+3.3V is not output.
[Power Supply Section]>
See FLOW CHART NO.6 <AMP+13V is not output.
[Power Supply Section]>
No
Yes
Yes
