15
Amplifier
FM
AM
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.
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.
Sound level is low.
The INPUT selector will not function though it is
turned.
Using the BASS, TREBLE, BALANCE and
LOUDNESS controls does not affect the tone.
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 distance or range within which the remote
control transmitter can be used decreases.
CAUSE
Power cord is not plugged in or is not completely
inserted.
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 functioned because of
short circuit etc.
The SLEEP timer 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 power to the component connected to the REC
OUT terminals of this unit is off.
The LOUDNESS control is functioning.
The CD DIRECT AMP switch is ON.
The CD DIRECT AMP or PURE DIRECT switch is
ON.
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 lightning, 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.
REMEDY
Firmly plug in the power cord.
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.
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.
Connect the speakers 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.
Set the LOUDNESS control to the FLAT position.
Switch off the CD DIRECT AMP switch.
The CD DIRECT AMP and PURE DIRECT switches
must be switched OFF to use those controls.
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.
Relocate this unit away from the TV.
Change the position of the main unit.
Replace the batteries with new ones.
