Noise is often created by the following factors, and often the radio is OK when it is
checked individually.
Travelling conditions of the vehicle
Terrain of area travelled through
Surrounding buildings
Signal conditions
Time period
For this reason, if there are still problems with noise even after the measures described
in inspection procedure 5 to 9 have been taken, get information on the factors listed above
as well as determining whether the problem occurs with AM/FM/WM/LW, the station names, frequencies,
etc. and contact the radio manufacturer’s service centre.