27
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.
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 Auto
tuning.
A desired station cannot be tuned in with Auto
tuning.
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 monitoring is
performed by using the headphones connected
to the compact disc player or cassette deck
CAUSE
Power cord is not plugged in or is not completely
inserted.
Incorrect output cord connections.
Appropriate input selector is not pressed.
The protection circuit has activated because of
short circuit etc.
Incorrect setting of the BALANCE control.
Incorrect cord connection.
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 mode is in PHANTOM mode.
Incorrect sound field program selection.
No sound field program is selected.
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.
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.
Connect the cords properly. If the problem persists,
the cords may be defective.
Press the appropriate input selector corresponding
to the input source.
Turning the unit off and then on will reset the
protection circuit.
Adjust it to the appropriate position.
Connect the cord properly. If the problem persists,
the cables 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.
Turn up the sound output level with the REAR level
control.
Select another program suitable for the monaural
sound source.
Turn up the sound output level with the CENTER
level control.
Select NORMAL or WIDE.
Select the appropriate program.
Check the antenna connections.
Try using a multiple element FM antenna.
Adjust antenna placement to eliminate multipath
interference.
Use Manual tuning mode.
Use a high quality directional FM antenna.
Tighten the AM loop antenna connections and
rotate it for best reception.
Use Manual tuning mode.
Use an outdoor antenna and a ground wire. This
will help somewhat but it is difficult to eliminate all
noise.
Move the television away.
Change the position of the main unit.
Replace the batteries with new ones.
Turn the power to this unit on.
