8-4 PL12.6ATR
[Audio Signal Section]
SP3801, SP3802 or CL3801 may be defective.
Check and replace these parts.
Audio is not output normally.
FLOW CHART NO.1
Are the audio signals output to Pin(1, 4) of CN3801?
Replace Digital Main CBA Unit.
No
Ye s
Is approximately +24V voltage supplied to Pin(13, 14)
of CN631?
Is
approximately +
3.3V voltage supplied to Pin(11) of
CN631?
No
No
Ye s
See FLO
W CHART NO
.7 <AL+3.3V is not output.
[Power Supply Section]>
See FLO
W CHART NO
.6 <AMP+24V is not output.
[Power Supply Section]>
Ye s
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