Pioneer SC-82 Service Manual page 31

5

No sound only in tuner (There may be troubles with the power source of circuit and control signals.
Bad connection of cables and connectors should be also considered.)
Check the path of the relevant channel in AUDIO ASSY, and check TUNER MODULE.

No sound only in POWERD HD ZONE
Speaker setting is correct ?
Yes
Is there signal in the IC1818-1, 2, 3, 4pin of
DIGITAL MAIN_L ASSY ?
Yes
Is there signal in the CN1801-25, 26pin of
DIGITAL MAIN_L ASSY ?
Yes
Check the VOL IC(IC2501, IC3273) peripheral circuit of
DIGITAL MAIN_L ASSY ?
5
6
No
Set the Speaker setting correctly.
No
Check the path from IC1602.
No
Check the path from IC1818.
SC-82
6
7
7
8
A
B
C
D
E
F
31
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