Yamaha RX-797 Owner's Manual page 51

The power of this unit is turned off, or this
The sound is
unit is set to the standby mode.
degraded when
listening with the
headphones
connected to the CD
player or the tape
deck connected to
this unit.
The LOUDNESS control is functioning.
The sound level is
low.
The CD DIRECT AMP button is turned
The input source
on.
cannot be changed
although the INPUT
selector is rotated.
The CD DIRECT AMP or the PURE
Using the BASS,
DIRECT button is turned on.
TREBLE, BALANCE
and LOUDNESS
controls does not
affect the tonal
quality.
■ Tuner
Problem
The particular characteristics of the FM
FM stereo
stereo broadcasts being received may
reception is
cause this problem when the transmitter is
noisy.
too far away or the antenna input is poor.
There is multipath interference.
There is
distortion, and
clear reception
cannot be
obtained even
with a good FM
antenna.
FM
The signal is too weak.
The desired
station cannot
be tuned in
with the
automatic
tuning method.
This unit has been disconnected for a long
Previously
period.
preset stations
can no longer
be tuned in.
The signal is weak or the antenna
The desired
connections are loose.
station cannot
be tuned in
with the
automatic
tuning method.
The noises may result from lightning,
AM There are
fluorescent lamps, motors, thermostats or
continuous
other electrical equipment.
crackling and
hissing noises.
A TV set is being used nearby.
There are
buzzing and
whining noises.
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.
Cause
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.
TROUBLESHOOTING
Remedy
17
20
20
20
See
page
14
25
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14
25
26
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25
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47