72
MT-700
10.3 Troubleshooting
Troubleshooting Chart
Symptom
Probable Cause
Corrective Action
Transceiver won’t turn On.
No dc voltage, blown fuse,
faulty wiring.
Press and hold the
PWR/VOL
knob, check buss voltage, and
replace fuse (6.3 Amp), check
power cable and connections.
Buzzing sound from speaker
with engine running.
Ignition or charging system
noise.
Reroute dc power cable,
install noise filter on alternator
and dc power cable, use
resistive spark plug wires.
Squelch control set too high,
volume control set too low.
Set SQ control full CCW, set
PWR/VOL
CW.
Channel blocked by stuck mic
button.
Select a different channel.
Look for
TX
annunciator in
display.
No sound from speaker.
Faulty external speaker or
cable.
Unplug external speaker
cable.
Antenna.
Have a technician test
transmitter output power and
antenna VSWR.
Reports of weak transmit
signals even when using
HI
power settings.
Coaxial cable faulty.
Inspect
antenna
cable
carefully for nicks. Wet coax
absorbs transmitter power.
Lat/Lon position display not
turned On.
Use Menu – Data Set – LL
Position, to turn On.
GPS cable faulty or
disconnected.
Check cable and connections.
Latitude and longitude
coordinates are not displayed.
GPS not operating or position
is invalid.
Make sure GPS is functioning
and output format is NMEA
0183 with GLL, GGA, RMC or
GNS sentence selected.
Summary of Contents for MT-700
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