8-4 PL12.3ATR
[Audio Signal Section]
SP3801, SP3802 or CL3801 may be defective.
Check and replace these parts.
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 CN501?
Is
approximately +
3.3V voltage supplied to Pin(11) of
CN501?
No
No
Ye s
See FLO
W CHAR
T NO
.8 <AL+3.3V is not output.
[Power Supply Section]>
See FLO
W CHAR
T NO
.6 <AMP+24V is not output.
[Power Supply Section]>
Ye s
Audio is not output normally.
FLOW CHART NO.1
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