Table 34: Possible Faults In The Mobile Installation - Codan Envoy Reference Manual

I
NSTALLATION
M
OBILE STATIONS
Troubleshooting the mobile installation
Common problems caused by incorrect installation are listed in

Table 34: Possible faults in the mobile installation

Symptom
No power
Tuning fails
Distortion of the
transmit audio signal
Transceiver is not
responding to
instructions
Voltage drop in the
fuse, the control
leads, or the battery
398
Possible cause
The internal fuse of the
transceiver has blown
Poor connections
Power not switched on
Battery not supplying the
correct voltage, or is in
poor condition
Inadequate earthing of the
antenna
Inadequate earthing of the
transceiver to the vehicle
chassis
The transceiver may not be
connected correctly
Faulty cables and/or
connectors
Voltage less than 12 V DC
Action
Replace the fuse.
Check that the battery is connected correctly to the
transceiver.
Check that the AC mains supply and the
transceiver supply are both switched on.
Check battery supply.
Antenna mounting bracket should be welded or
bolted directly to the chassis.
All paint should be cleaned from mating surfaces.
The earth braid provided should be connected to
an independent earthing point going to the
bodywork of the vehicle, or to the battery negative
if possible.
Improve the earth of the transceiver by connecting
an earth strap (braid or copper strip) from the earth
screw of the transceiver to the vehicle chassis,
keeping the strap as short as possible.
Check that the cables and connectors between all
items of equipment are securely connected and not
damaged.
Check that the cables and connectors between all
items of equipment are securely connected and not
damaged.
Check the voltage; it must be greater than
12 V DC on transmit.
E ™ T
NVOY
Table 34.
R M
RANSCEIVER EFERENCE ANUAL