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Yamaha DSP-A492 Owner's Manual: Troubleshooting

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TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple
measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and
contact your authorized YAMAHA dealer or service center for help.
SYMPTOM
The unit fails to turn on when the POWER
switch is pressed, or turns off suddenly soon
after the power is turned on.
No sound or no picture.
The sound suddenly goes off.
Only one side speaker outputs the sound.
Sound "hums".
The volume level is low while playing a record.
The volume level cannot be increased, or
sound is distorted.
No sound from the rear speakers.
No sound from the center speaker.
The remote control transmitter does not work.
The sound is degraded when listening with the
headphones connected to the compact disc
player or cassette deck that are connected with
this unit.
32
CAUSE
Power cord is not plugged in or is not completely
inserted.
The IMPEDANCE SELECTOR switch on the rear
panel is not set to the upper or the lower end
exactly.
Incorrect output cord connections.
Appropriate input source is not selected.
The SPEAKERS switches are not set properly.
Speaker connections are not secure.
The protection circuit has been activated because
of short circuit etc.
The SLEEP timer has functioned.
Incorrect setting of the BALANCE control.
Incorrect cord connections.
Incorrect cord connections.
No connection from the turntable to the GND
terminal.
The record is being played on a turntable with an
MC cartridge.
The power to the component connected to the REC
OUT terminals of this unit is off.
The sound output level to the rear speakers is set
to minimum.
The monaural sound source is played in DOLBY
PRO LOGIC or DOLBY PRO LOGIC ENHANCED
mode.
The sound output level to the center speaker is set
to minimum.
The center channel mode is in PHANTOM mode.
Incorrect sound field program selection.
Direct sunlight or lighting (of an inverter type of
flourescent lamp etc.) is striking the remote control
sensor of the main unit.
The batteries of this remote control transmitter are
too weak.
The power to this unit is off.
REMEDY
Firmly plug in the power cord.
Set the switch to the upper or the lower end exactly.
Connect the cords properly. If the problem persists,
the cords may be defective.
Select an appropriate input source with the input
selector buttons.
Set the SPEAKERS switch which corresponds to
the speakers to be used to the ON position.
Secure the connections.
Turning the unit off and then on will reset the
protection circuit.
Cancel the SLEEP timer function.
Adjust it to the appropriate position.
Connect the cords properly. If the problem persists,
the cords may be defective.
Firmly connect the audio plugs. If the problem
persists, the cords may be defective.
Make the GND connection between the turntable
and this unit.
The player should be connected to the unit through
the MC head amplifier.
Turn the power to the component on.
Raise the sound output level to the rear speakers.
Select another program suitable for the monaural
sound source.
Raise the sound output level to the center speaker.
Select NORMAL or WIDE.
Select the appropriate program.
Change the position of the main unit.
Replace the batteries with new ones.
Turn the power to this unit on.

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