Yamaha AX-392 - Manual (Page 14)

14
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.
TROUBLESHOOTING
SYMPTOM
The unit fails to turn on when the
STANDBY/ON switch is pressed, or turns
into the standby mode suddenly soon after
the power is turned on.
It happens that this unit does not work
normally.
No sound.
The sound suddenly goes off.
Only one side speaker outputs the sound.
There is a lack of bass, and no ambience.
Sound “hums”.
The volume level is low while playing a
record.
The volume level cannot be increased, or
sound is distorted.
The sound is degraded when listening with
the headphones connected to the compact
disc player or tape deck that are connected
with this unit.
Sound level is low.
The input source cannot be changed,
though the INPUT selector is turned.
Using the BASS, TREBLE, BALANCE and
LOUDNESS controls does not affect the
tone.
The remote control transmitter does not
work.
The distance or range within which the
remote control transmitter can be used is
short.
CAUSE
Power cord is not plugged in or is not
completely inserted.
The IMPEDANCE SELECTOR switch on the
rear panel is not set to either end closely.
There is an influence of strong external noise
(lightning, excessive static electricity, etc.) or a
misoperation on this unit while using this unit.
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.
The + and – wires are connected in reverse at
the amplifier or speakers.
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 component connected to the REC terminals
of this unit is turned off.
This unit is in the standby mode.
The LOUDNESS control is functioning.
The CD DIRECT AMP switch is ON.
The CD DIRECT AMP switch is ON.
Direct sunlight or lighting (of an inverter type of
fluorescent lamp etc.) is striking the remote
control sensor of the main unit.
The batteries of this remote control transmitter
are too weak.
REMEDY
Firmly plug in the power cord.
Set the switch to either end closely.
Turn this unit into the standby mode and
disconnect the AC power cord from the AC
outlet. After about 30 seconds have passed,
connect the power and operate this unit again.
Connect the cords properly. If the problem
persists, the cords may be defective.
Select an appropriate input source with the
INPUT selector.
Set the SPEAKERS switch which corresponds
to the speakers to be used to the ON position.
Secure the connections.
Turn this unit into the standby mode, and then
turn this unit on to 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.
Connect the speaker wires in the correct phase
(+ and –).
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.
Turn the power to this unit on.
Set the LOUDNESS control to the FLAT
position.
Switch off the CD DIRECT AMP switch.
The CD DIRECT AMP switch must be switched
OFF to use those controls.
Change position of the main unit.
Replace the batteries with new ones.