Mitsubishi MOTORS L200 1996, Руководство по ремонту

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CHASSIS ELECTRICAL –
Radio and Tape Player
54-64
A-3 Mixed with noise, only at night (AM).
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.