CHASSIS ELECTRICAL ± Radio and Tape Player
54A-50
A-2 Mixed with noise, only at night.
The following factors can be considered as possible
causes of noise appearing at night.
1. Factors due to signal conditions: Due to the
fact that long-distance signals are more easily
received at night, even stations that are received
without problem during the day may experience
interference in a general worsening of reception
conditions. The weaker a station is the more
susceptible it is to interference, and a change
to a different station or the appearance of a
beating sound* may occur.
Beat sound*: Two signals close in frequency
interfere with each other, creating a repetitious
high-pitched sound. This sound is generated
not only by sound signals but by electrical waves
as well.
2. Factors due to vehicle noise: Alternator noise
may be a cause.
Is the noise still obvious even with the
lamps OFF?
No
Yes
Do the following measures eliminate
the noise?
D Tune to a station with a strong
signal.
D Tune to a station with a strong signal
without completely extending the
antenna.
Yes
OK
No
Does the noise fade away when the
vehicle harness is moved away from
the radio chassis? (if the harness is
not in the proper position.)
Yes
OK
No
If there is more noise than other radios, consult a service
centre.
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