Specifications

Maintenance
15
Troubleshooting
In case a problem or malfunction occurs, identify the closest description appearing in Table 1 and
then perform the listed corrective actions.
Table 1. Troubleshooting Chart
Problem Corrective Actions
Blank display CHECK
• DC and/or AC power cables are connected properly.
• The 30A fuse installed in the fuse holder located on the red wire of the DC power
cable is good.
• The 6.3A fuse installed in the AC POWER connector located on the
MICOM-3TS-RDP connector panel, is good.
Display present but
weak or no receive
signal or noise
CHECK
• The setting of the volume control is in the middle position.
• The squelch is set to OFF, and the monitor is set to ON.
• The operating channel is properly programmed (frequency, mode of operation,
etc.).
• All antenna wires and tuner cables and connections are intact.
Engine noise picked
up by the antenna
Determine by observing difference in the reception by turning the engine ON/OFF.
ENSURE
• Ground leads are properly connected, all power wires and ground leads are as short
as possible
• That the noise blanker is enabled.
• Install noise reduction kit.
Poor or no
transmission
CHECK
• The 30A fuse protecting the positive lead of the power cable is good.
• The 6.3A fuse installed in the AC POWER connector located on the
MICOM-3TS-RDP connector panel, is good.
• Proper grounding cables are connected from the radio and from the antenna tuner
to the vehicle chassis.
• While speaking, check RF power bars for activity. The resulting RF power output is
displayed in approximately 15W increments (bars) being added from the bottom of
the display upwards:
!"
When three or more bars disappear from the RF power bar display, there may
be a problem in the antenna system. If the antenna cabling or the antenna
mast rigging position has changed since the antenna was last tuned, the
antenna tuner will not be adjusted automatically. To retune the antenna
tuner, press the ENTER key. If transmission is still poor, inspect the tuner,
antenna and ground plane for loose connections or misplaced parts. If no
loose connections are found, call your service representative for assistance.
!"
There are no bars on the RF power bar display: indicates low transmitter
power, which can be caused by a faulty microphone, faulty transmitter,
overheating, or defective antenna system.