20
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
Crackling sounds from time to time
(especially in weak signal areas).
FM stereo reception is noisy.
The ST indicator flickers and
reception is noisy.
There is distortion and clear reception
cannot be obtained even with a good
FM antenna.
No stereo effect even with a stereo
broadcast.
A desired station cannot be tuned in
with Automatic tuning.
Previously preset stations can no
longer be tuned in.
Insufficient sensitivity.
A desired station cannot be tuned in
with Automatic tuning.
There are continuous crackling and
hissing noises.
There are buzzing and whining noises
(especially in the evening).
CAUSE
Ignition noise from passing vehicles.
Noise from thermostats or other electrical
equipment.
Because of the characteristics of FM stereo
broadcasts, this is limited to cases where the
transmitter is far away or the antenna input is
poor.
Insufficient antenna input.
Not tuned correctly.
There is multipath interference.
The TUNING MODE button is set to the
manual tuning mode.
The station is too weak.
The tuner has been unplugged for a long
period.
Weak signal or loose antenna connections.
These noises result from lightning, fluorescent
lamps, motors, thermostats and other
electrical equipment.
Another station is interfering with the received
station.
A television set is being used nearby.
REMEDY
The FM antenna should be put up as high as
possible, away from the road, and a coaxial
cable used.
Attach a noise suppressor to the equipment
causing the noise.
Check the antenna connections.
Try using a high quality directional FM
antenna.
Set the TUNING MODE button to the manual
tuning mode.
Use an antenna appropriate for the reception
condition in your area.
Tune again.
Adjust antenna placement to eliminate multi-
path interference.
Set the button so that “AUTO” lights up on
the display.
Use the manual tuning mode.
Use a high quality directional FM antenna.
Repeat the presetting procedure.
Tighten the AM loop antenna connections and
rotate it for best reception.
Use the manual tuning mode.
Use an outdoor antenna and a ground wire.
This will help somewhat but it is difficult to
eliminate all noises.
This is impossible to remedy.
Relocate this unit away from the TV.
FM
AM
