Yamaha RX-797 Mode D'emploi page 42

TROUBLESHOOTING
The sound is
degraded when
listening with the
headphones
connected to the CD
player or the tape
deck connected to
this unit.
The sound level is
low.
The input source
cannot be changed
although the INPUT
selector is rotated.
Using the BASS,
TREBLE, BALANCE
and LOUDNESS
controls does not
affect the tonal
quality.
■ Tuner
Problem
FM stereo
reception is
noisy.
There is
distortion, and
clear reception
cannot be
obtained even
with a good FM
antenna.
FM
The desired
station cannot
be tuned in
with the
automatic
tuning method.
Previously
preset stations
can no longer
be tuned in.
The desired
station cannot
be tuned in
with the
automatic
tuning method.
AM There are
continuous
crackling and
hissing noises.
There are
buzzing and
whining noises.
40
The power of this unit is turned off, or this
unit is set to the standby mode.
The LOUDNESS control is functioning.
The CD DIRECT AMP button is turned
on.
The CD DIRECT AMP or the PURE
DIRECT button is turned on.
Cause
The particular characteristics of the FM
stereo broadcasts being received may
cause this problem when the transmitter is
too far away or the antenna input is poor.
There is multipath interference.
The signal is too weak.
This unit has been disconnected for a long
period.
The signal is weak or the antenna
connections are loose.
The noises may result from lightning,
fluorescent lamps, motors, thermostats or
other electrical equipment.
A TV set is being used nearby.
Turn on the power of this unit.
Set the LOUDNESS control to the FLAT position.
Turn off the CD DIRECT AMP button.
The CD DIRECT AMP or the PURE DIRECT button
must be turned off to use those controls.
Remedy
Check the antenna connections.
Try using a high-quality directional FM antenna.
Try using the manual tuning method.
Adjust the antenna position to eliminate the multipath
interference.
Try using a high-quality directional FM antenna.
Try using the manual tuning method.
Preset the stations again.
Tighten the AM loop antenna connections and orient
it for the best reception.
Try using the manual tuning method.
Try using an outdoor antenna and a ground wire.
This will help somewhat, but it is difficult to
eliminate all noise.
Move this unit away from the TV set.
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See
page
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