Yamaha HTR-5550 Owner's Manual page 59

I Tuner
Problem
FM stereo reception is
noisy.
There is distortion, and
clear reception cannot
be obtained even with a
FM
good FM antenna.
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.
There are continuous
AM
crackling and hissing
noises.
There are buzzing and
whining noises
(especially in the
evening).
I Remote control
Problem
The remote control
does not work nor
function properly.
Cause
The characteristics of FM stereo
broadcasts may cause this problem
when the transmitter is too far away or
the antenna input is poor.
There is multipath interference.
The station is too weak.
This unit has been disconnected for a
long period.
The signal is weak or the antenna
connections are loose.
Noises result from lightning,
fluorescent lamps, motors, thermostats
and other electrical equipment.
A TV set is being used nearby.
Cause
Wrong distance or angle.
Direct sunlight or lighting (from an
inverter type of fluorescent lamp, etc.) is
striking the remote control sensor of this
unit.
The batteries are weak.
The manufacture code has not correctly
set.
Even if the manufacturer code is
correctly set, there are some models that
do not respond to the remote control.
Remedy
Check the antenna connections.
Try using a high-quality directional FM
antenna.
Use the manual tuning method.
Adjust the antenna position to eliminate
multipath interference.
Use a high-quality directional FM antenna.
Use the manual tuning method.
Re-store the stations.
Tighten the AM loop antenna connections
and orient it for best reception.
Use the manual tuning method.
Use 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.
Remedy
The remote control will function within a
maximum range of 6 m (20 feet) and no more
than 30 degrees off-axis from the front panel.
Reposition this unit.
Replace all batteries with new ones.
Set the code correctly.
Try setting another code of the same
manufacturer.
TROUBLESHOOTING
Refer
to page
17
34
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17
34
35, 36
17
34
17
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page
7
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3
47
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55