Operator's Manual

OM-E 2072-09689-00
3-15
Table 3-1. Preliminary Troubleshooting Chart
Problem Corrective Actions
Blank display Check that the DC power cable is properly connected to the radio set and to the
battery.
Check the 30A fuse installed in the fuse holder located on the red wire of the DC
power cable
Display present,
but weak or no
receive signal or
noise
Check for proper connection of antenna to its antenna tuner, and from the
antenna tuner to radio (loose or broken connections, damage to cables, etc.).
Change the operating channel, and then return to the original channel. This will
cause the antenna tuner to retune.
Check for correct programming of operating channel (frequency, mode of
operation, etc.). You may also try to establish communication with a nearby
station, to check whether you can receive it properly.
Set the squelch to OFF
Engine noise
picked up by the
antenna
Determine by observing difference in the reception by turning the engine
ON/OFF.
After confirming that the engine noise is the source, make sure that the ground
leads are properly connected, and all power wires and ground leads are as short
as possible.
Install a noise reduction kit
No transmission,
or low transmit
power
Check that grounding leads are properly connected from the radio and from the
antenna tuner to the vehicle chassis, and they are as short as possible..
While speaking, check the transmit power indicator for activity:
• If the transmit power indication is low, t
his may be caused by a faulty
microphone, faulty transmitter, overheating, or a defective antenna system.
•
If there is a problem with the antenna system, often you may note that the
reflected power indication is very large
. Even if the reflected power
indic
ation seems normal, try to change the operating channel, and then
return to the original channel (this will cause the antenna tuner to retune).
Also check the antenna system, the connections of the antenna to the
antenna tuner, and the connections from the
antenna tuner to radio (loose
or broken connections, damage to cables, etc.)
3-7.2.2 Handling Fault Messages
In case a failure occurs during operation, the radio displays a fault message. Refer to Table 3-2 and
perform the corrective actions listed for the corresponding message, until the problem is corrected.
Table 3-2. Fault Messages
Message Corrective Actions
NO CLOCK Service the Micom-Z unit (defective LORD board)
SYN FAIL Perform the built-in test using the MRC, to obtain more information
PW_LATCH Perform the built-in test using the MRC, to obtain more information.
Check the condition of the antenna and its connections, because this error is
displayed when the VSWR exceeds 3.5:1. To check whether the problem is
caused by high VSWR, transmit into a dummy load with suitable power rating. If
the problem persists, service the Micom-Z unit (defective HIGH POWER board)