Onkyo A-9755 Stereo Amplifier User Manual


 
18
Troubleshooting
If you have any trouble using the A-9755/A-9555, look for a solution here. If you cant resolve the issue yourself,
contact your Onkyo dealer.
Cant turn on the A-9755/A-9555.
Make sure that the power cord is properly plugged into the wall outlet. (page 5)
Unplug the power cord from the wall outlet, wait ten seconds or more, then plug it in again.
By default, pressing the remote controllers [ON] button once does not turn on all of the system components. You
need to press the remote controllers [ON] button again. Alternatively, you can set the A-9755/A-9555 so that all
components do turn on simultaneously (page 14).
The STANDBY indicator is ashing.
The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately and contact
your Onkyo dealer.
Theres no sound or its very quiet.
When the A-9755 is used as a power amplier (MAIN IN indicator lights up), the sound from components connected
to the preamp is output. To output the sound from a component thats connected to the A-9755, or to use the A-9755
as a preamp, press the [POWER AMP DIRECT (MAIN IN)] button for 3 seconds until the MAIN IN indicator goes
off. (page 17)
Make sure that all audio plugs are pushed in all the way (page 11).
Make sure that the inputs and outputs of all components are connected properly.
Make sure that the polarity of the speaker cables is correct and that the bare wires are in contact with the metal part
of each speaker terminal (page 10).
Make sure that the correct input source is selected (page 15).
If the Volume indicator ashes slowly, press the remote controllers [MUTING] button to unmute the A-9755/A-9555
(page 15).
Make sure that none of the cables are bent, twisted, or damaged.
To use a turntable with a moving-coil (MC) type cartridge, you need a commercially available MC phono preamp
(page 11).
If the Volume indicator ashes quickly, any speakers may not be connected to the A-9755/A-9555. Make sure that
the required connection is performed appropriately, and set the [POWER] switch to the ON position again (pages 10,
14).
Verify if the SPEAKERS selector is congured correctly. If OFF is selected, no sound will be output from any of
the speakers (page 14).
Noise can be heard.
Using cable ties to bundle audio cables with power cords, speaker cables, and so on may degrade the audio perfor-
mance, so dont bundle them together.
An audio cable may be picking up interference. Try repositioning your cables.
The tone controls have no effect.
If the PURE DIRECT indicator lights up, the PURE DIRECT function is on and the tone controls have no effect.
Press the [PURE DIRECT] button to turn the function off. The PURE DIRECT indicator will go off (page 16).
The remote controller doesnt work.
Make sure that the batteries are installed with the correct polarity (page 5).
Install new batteries. Dont mix different types of batteries or old and new batteries (page 5).
Make sure that the remote controller is not too far away from the A-9755/A-9555 and that theres no obstruction
between the remote controller and the A-9755/A-9555s remote control sensor (page 9).
Make sure that the A-9755/A-9555 is not subjected to direct sunshine or inverter-type orescent lights. Relocate if
necessary (page 9).
If the A-9755/A-9555 is installed in a rack or cabinet with colored glass doors, the remote controller may not work
reliably when the doors are closed (page 9).
Cant control other components?
If its an Onkyo component, make sure that the cable and analog audio cable are connected properly. Connecting
only an cable wont work. (page 13)
Power
Audio
Remote Controller