Pioneer SC-71 Service Manual page 29

5

No sound from HEADPHONES (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.)
If it is impossible to change to HEADPHONE, check the path of XHPDET signal.
Sound comes from HEADPHONE
in Pure Direct by applying a signal
to analog input terminal.
Yes
In AutoSurr with removing
HEADPHONE, the signal of the
relevant channel does not exists in
D-AUDIO BRIDGE2_SS ASSY
Yes
Check the path of the relevant
signal in DIGITAL MAIN_L ASSY.

No sound only from ZONE (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.)
Sound comes from ZONE2 OUT by applying the signal to analog
input terminal.
Yes
If music content is replayed with Front USB terminal, sound does
not come from ZONE2.
Yes
The signal of the relevant channel does not exist in
D-AUDIO BRIDGE2_SS ASSY.
Yes
Check the path of the relevant signal in DIGITAL MAIN_L ASSY.
OK
Check the path of the relevant signal in FRONT HDMI USB ASSY.

No sound only from FRONT USB terminal or only from MHL terminal (There may be troubles with power
source of circuit and control signals. Bad connection of cables and connectors should be also considered. )
Check the path of the relevant signal in FRONT HDMI USB ASSY.
OK
Check the path of the relevant signal in DIGITAL MAIN_L ASSY.

No sound only in HDMI, MEDIA SERVER and INTERNET RADIO (There may be troubles with power source of
circuit and control signals. Bad connection of cables and connectors should be also considered.)
Check the path of the relevant signal in DIGITAL MAIN_L ASSY.
5
6
No
No
Check the path of the relevant
channel in AUDIO_SS ASSY.
SC-71
6
7
No
Sound comes from
Preout in PureDirect.
Yes
No
HP signal exists in
V-REG_SS ASSY.
Yes
Check the HP signal
path in MIC HP ASSY.
No
Check the path of the relevant channel
in AUDIO_SS ASSY.
Check the path of the relevant channel
No
in AUDIO_SS ASSY.
7
8
Check the path of the relevant
channel in AUDIO_SS ASSY.
Check the path of the relevant
channel in AUDIO_SS ASSY.
29
8
A
B
C
D
E
F