Operation Manual

10
MAINTENANCE
10-2
Troubleshooting
The following chart is designed to help you solve problems that are not equipment malfunctions.
If you are unable to locate the cause of a problem, or solve it through the use of this chart, contact your nearest
Icom Dealer or Service Center.
PROBLEM
POSSIBLE CAUSE SOLUTION REF.
Power does not turn ON
when
POWER
is pushed.
The power cable is not connected
properly.
Reconnect the DC power cable properly. p. 2-1
The external power supply is turned OFF. Turn ON the external power supply. p. 2-1
The DC power cable fuses or circuitry
fuse are blown.
Find and repair the cause of the problem,
and then replace the damaged fuse with
a new one.
–
No sound is heard from
the speaker.
The audio level is too low.
Rotate
AF RF/SQL
(inner) clockwise to
obtain a suitable listening level.
p. 3-1
The squelch is closed.
Rotate
AF RF/SQL
(outer) to the 12
o’clock position to open the squelch.
p. 3-7
If no sound is heard only from the Sub
band, the Dualwatch function is OFF.
Turn ON the Dualwatch function. p. 3-2
Headphones are connected. Disconnect the headphones. p. 13-1
The Mute function is ON.
Push
AF RF/SQL
to turn OFF the Mute
function on whichever band is selected
(Main or Sub).
p. 1-1
The external speaker cable is defective. Check the external speaker cable and
repair it.
–
Sensitivity is too low, and
only strong signals are
heard.
The attenuator is activated. Turn OFF the attenuator in the
Multi-function key group.
p. 4-1
The squelch is closed.
Rotate
AF RF/SQL
(outer) to 12 o’clock
position to open the squelch.
p. 3-7
The antenna is defective or the coaxial
cable is defective.
Repair the problem and then reconnect
the antenna.
p. 2-2
You are using an antenna that is not
suitable for the band you have selected.
Connect an antenna suitable for the
operating frequency.
p. 2-2
Hold down
TUNER
to tune the antenna.
p. 7-2
No power output or the
output power is too low.
The operating frequency is outside the
ham band.
Set the frequency to a ham band. p. 3-4
The modulation input signal level is set
too low.
Adjust the microphone gain in MIC GAIN. p. 3-9
The microphone is bad, or the [MIC]
connector is shorted or defective.
Test the microphone and check the [MIC]
connector.
p. 13-3
The antenna SWR is more than 3:1. Adjust the antenna for an SWR of less
than 3:1.
p. 7-3
The antenna is not properly tuned.
Hold down
TUNER
for 1 second to tune
the antenna.
p. 7-3
The transmit output power is set too low. Adjust the RF POWER in the Multi-
function menu.
p. 3-8