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Ignition
The most common source of noise in reception is the ignition
system. This is a result of the radio being placed close to the
ignition system (engine). This type of noise can be easily
detected because it will vary in intensity of pitch with the
speed of the engine.
Usually, the ignition noise can be suppressed considerably
by using a radio suppression type high voltage ignition wire
and suppressor resistor in the ignition system. (Most vehicles
employ this wire and resistor but it may be necessary to check
them for correct operation.) Another method of suppression
is the use of additional noise suppressors. These can be
obtained from most CB radio or electronic supply shops.
Interference
Radio reception in a moving environment is very different
from reception in a stationary environment (home). It is very
important to understand the difference.
AM reception will deteriorate when passing under a bridge
or when passing under high voltage lines. Although AM
is subject to environmental noise, it has the ability to be
received at great distance. This is because broadcasting
signals follow the curvature of the earth and are reflected
back by the upper atmosphere.
TROUBLESHOOTING
Symptom
Cause
No power
The vehicle's
accessory switch
is not on
Fuse is blown
No sound
Volume too low
Wiring is
not properly
connected
The
Built-in
operation
microcomputer
keys do not
is not operating
work
properly due to
noise
Cannot tune
Antenna cable is
to radio
not connected
station,
Signals are too
auto-seek
weak.
does not
work
ERROR-01
Database or
on LCD
decoder error
17
Solution
If the power supply is
properly connected to
the vehicle's accessory
terminal, switch the
ignition key to "ACC. "
Replace the fuse.
Adjust volume to
audible level.
Check wiring
connections.
Press the RESET
button.
Insert the antenna
cable firmly.
Select a station
manually.
Change to another
mode.
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