40
Amplifier
FM
AM
Others
Remote control
transmitter
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.
FM stereo reception is noisy.
There is distortion and clear reception cannot
be obtained even with a good FM antenna.
A desired station cannot be tuned in with the
automatic tuning method.
Previously preset stations can no longer be
tuned in.
A desired station cannot be tuned in with the
automatic tuning method.
There are continuous crackling and hissing
noises.
There are buzzing and whining noises
(especially in the evening).
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.
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 0.
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 0.
The center channel mode is in PHANTOM mode.
Incorrect sound field program selection.
Because of the characteristics of FM stereo
broadcasts, this is limited to cases where the
transmitter is too far away or the antenna input is
poor.
There is multipath interference.
The station is too weak.
This unit has been unplugged for a long period.
Weak signal or loose antenna connections.
Noises will result from ligtning, fluorescent lamps,
motors, thermostats and other electrical equipment.
A television set is being used nearby.
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.
Check the antenna connections.
Try using a high quality directional FM antenna.
Set the TUNING MODE button to the manual tuning
mode.
Adjust antenna placement to eliminate multipath
interference.
Use the manual tuning method.
Use a high quality directional FM antenna.
Repeat the presetting procedure.
Tighten the AM loop antenna connections and
rotate it for best reception.
Use the manual tuning method.
Use an outdoor antenna and a ground wire. This
will help somewhat but it is difficult to eliminate all
noise.
Relocate this unit away from the TV.
Change the position of the main unit.
Replace the batteries with new ones.
Turn the power to this unit on.
