CHASSIS ELECTRICAL ± Radio and Tape Player
54A-53
A-5 Some noise appears when there is vibration or shocks during travelling.
Are connectors properly connected?
No
Ensure proper connection.
Yes
Does noise appear when the radio switch is turned on while the
vehicle is stopped and the radio is struck while tuned away from
a station?
No
Static electricity noise:
Body static electric from the shock absorber rubber bushings used
to prevent vibration, tyres, etc. occurs because of separation from
the earth, causing a buzzing noise. Since no measures can be
taken on the radio side, other steps should be taken to discharge
the static electricity of the vehicle body.
Yes
Is the radio correctly earthed? (Is the mounting screw tightened
securely?)
No
Tighten the screw securely.
Yes
Is the antenna correctly earthed? (If noise appears when the anten-
na is moved, this means the earth is not securely connected.)
No
If rust is present at the antenna earth screw, clean and tighten
the earth securely.
Yes
Repair or replace radio.
A-6 Ever-present noise.
Noise is often created by the following factors, and
often the radio is OK when it is checked individually.
D Travelling conditions of the vehicle
D Terrain of area travelled through
D Surrounding buildings
D Signal conditions
D Time period
For this reason, if there are still problems with noise
even after the measures described in steps A-1
to A-8 have been taken, get information on the
factors listed above as well as determining whether
the problem occurs with FM/MW/LW, the station
names, frequencies, etc., and contact a service
centre.
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