Yamaha RX-V420RDS Owner's Manual page 51

I Tuner
Problem
FM stereo reception
is noisy.
There is distortion,
and clear reception
cannot be obtained
even with a good FM
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
crackling and hissing
AM
noises.
There are buzzing and
whining noises
(especially in the
evening).
I Remote control
Problem
The remote control does
not work nor function
properly.
After this unit has been exposed to a strong external electric shock (such as lightning and strong static electricity) or if you
mishandle the operation of this unit, it may not function properly. In these cases, set this unit in the standby mode, disconnect
the power cord, plug it back in after 30 seconds, and start operating.
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.
The 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.
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 the manual tuning method.
Use a high-quality directional FM antenna.
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 the unit.
Replace all batteries with new ones.
TROUBLESHOOTING
Refer to
page
26
27
26
27
26
28
26
27
26
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Refer to
page
7
7
3
49