Pioneer SC-82 Service Manual page 28

1
NO SOUND (Except for troubles caused by setting and others)
EXT STEREO mode : 2ch signals are distributed to all channels.
OPTIMUM Surr mode : Surround mode of headphones
A

No sound from speakers (Single channel - Check only the signal path of the relevant channel. Plural channels
- There may be troubles with power source, control signals: MUTE, DET and others. Bad connection of cables
and connectors should be also considered.)
No sound only from front
channels (L/R 2 channels)
Yes
Sound comes form speakers in Pure Direct by
applying a signal to analog input terminal.
B Yes
In EXT STEREO, the signal of the
relevant channel does not exist in
A-DAC BRIDGE ASSY.
Yes
The signal of the relevant channel
does not exist in D-FILTER
BRIDGE_S ASSY.
Yes
Check the path of the relevant
signal in DIGITAL MAIN_L ASSY.
C

No sound only from Preout (Single channel - Check only the signal path of the relevant channel. Plural channels
- There may be troubles with power source, control signals: MUTE, DET and others. Bad connection of cables
and connectors should be also considered.)
No sound only in DVROUT - Check the relevant path in AUDIO ASSY .
No sound from speakers additionally
Yes
In EXT STEREO, the signal of the relevant channel does not exist in
A-DAC BRIDGE ASSY.
D
Yes
The signal of the relevant channel does not exist in D-FILTER
BRIDGE_S ASSY.
Yes
Check the path of the relevant signal in DIGITAL MAIN _L ASSY.

No sound only in COAX and OPT input (Single channel - Check only the signal path of the relevant channel.
Plural channels - There may be troubles with power source, control signals: MUTE, DET and others.
Bad connection of cables and connectors should be also considered.)
E
The signal of the relevant channel exists in OPT COAX_S ASSY.
Yes
Check the path of the relevant signal in DIGITAL MAIN_L ASSY.
F
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1
2
No
The sound of the relevant
channel does not come form Preout.
No
No
Check the path of the relevant
channel in AUDIO ASSY.
No
Check the path of the relevant
channel in FILTER_S ASSY.
2
3
No
The signal of the relevant channel
exists in PRE BRIDGE_S ASSY.
Yes
Check the signal path of the relevant channel in
IR BUFFER_S ASSY, or check the path of the power supply
to the relevant channel.
Check the signal path of the relevant channel in
IR INTERFACE_S ASSY, or check the path of the power
supply to the relevant channel.
Check the path of the relevant channel in D AMP_SS ASSY.
No
Check the path of the relevant channel
in AUDIO ASSY.
No
Check the path of the relevant channel
in AUDIO ASSY.
Check the path of the relevant channel
No
in FILTER_S ASSY.
No
Check the path of the relevant channel
in OPT COAX_S ASSY.
SC-82
3
4
No
Check the path of
the relevant
channel in AUDIO
Yes
ASSY.
OK
OK
4