Yamaha R-85 - 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
Amplifier
FM
AM
Others
Remote control
transmitter
SYMPTOM
The unit fails to turn on when the POWER
switch is pressed.
No sound.
The sound suddenly goes off.
Only one side speaker outputs the sound.
Sound “hums”.
The volume level is low while playing a record.
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.
The sound is degraded when monitoring is
performed by using the headphones connected
to the compact disc player or cassette deck
which are connected with this unit.
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.
Because of the characteristics of FM stereo
broadcasts, this is limited to cases where the
transmitter is too far 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.
Power cord of this unit is not plugged.
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 cord properly. If the problem persists, the
cables may be defective.
Firmly connect the audio plugs. If the problem
persists, the cord may be defective.
Make the GND connection between the turntable
and this unit.
The player should be connected to the receiver
through the MC head amplifier.
Check the antenna connections.
Try using a multiple element FM antenna.
Adjust antenna placement to eliminate multipath
interference.
Use Manual tuning mode.
Use high quality directional FM antenna.
Use Manual tuning mode.
Tighten the AM loop antenna connections and
rotate it for best reception.
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 position of the main unit.
Replace the batteries with new ones.
Plug in the power cord.