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Troubleshooting—Continued
Can’t record.
• The component connected to the MAIN IN jacks cannot be recorded.
• When using the A-9755 as a power amplifier (MAIN IN function), recording is not possible.
The Volume control has no effect.
• When using the A-9755 as a power amplifier (MAIN IN function), the Volume control has no effect. Adjust the
volume on the connected preamp instead.
The Muting function doesn’t work.
• When using the A-9755 as a power amplifier (MAIN IN function), the Muting function does not work. Use the muting
function on the connected preamp instead.
A-9755/A-9555 BLOCK DIAGRAM
Recording
Others
The A-9755/A-9555 contains a microcomputer for signal processing and control functions. In very
rare situations, severe interference, noise from an external source, or static electricity may cause
it to lock up. In the unlikely event that this happens, unplug the power cord from the wall outlet,
wait at least ten seconds, and then plug it back in again.
Onkyo is not responsible for damages (such as CD rental fees) due to unsuccessful recordings
caused by the unit’s malfunction. Before you record important data, make sure that the material
will be recorded correctly.
How to reset:
To reset the A-9755/A-9555 to its factory defaults, while holding down the [PURE DIRECT] button,
press the [LOUDNESS] button, and then release both buttons. The input selector indicators light
up for one second, and then the A-9755/A-9555 enters On mode.
PHONO
PURE DIRECT
CD
TUNER
TAPE
IN
IN
OUT
OUT
MD
HDD IN
LINE
MAIN IN
POWER
AMP
DIRECT
MAIN IN
BASS,
TREBLE
L-ch
SELECTOR
VOLUME
ON
OFF
OFF
ON
OFF
ON
OFF
ON
HEADPHONE
R-ch
LOW PASS
FILTER
DIGITAL
AMPLIFIER
DIGITAL
AMPLIFIER
LOW PASS
FILTER
SPEAKER B
RELAY
SPEAKER
A
RELAY
SPEAKER
A
A-9755 ONLY
SPEAKER
B
BASS, TREBLE