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4
MAINTENANCE
■ Troubleshooting
The following chart is designed to help you correct
problems which 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
Power does not come
on when the [POWER]
switch is pushed.
Sensitivity is low.
Operating band does
not change automati-
cally.
Output power is too
low.
Protection circuit acti-
vates during short peri-
ods of operation.
POSSIBLE CAUSE
•Cable connection is faulty.
• The circuit breaker is turned OFF.
•The antenna is not connected properly.
•The antenna for another band is select-
ed.
•The antenna is not properly tuned.
•Cable connection is faulty.
•CI-V setting is not properly pro-
grammed.
•Reverse connection on the antenna
input and output.
•[ALC adj] is not adjusted properly.
•The linear amplifier circuit is turned
OFF.
•The antenna for anther band is select-
ed.
•The antenna is not properly tuned.
•The protection circuit activates and a
band indicator blinks.
•Antenna SWR is more than 3:1.
•The antenna tuner is turned OFF.
•The linear amplifier is located in an area
with bad air circulation.
•[ALC adj] is not adjusted properly.
SOLUTION
•Check the connection and connection cable
pins.
•Check for the cause, then turn the circuit
breaker ON.
•Reconnect the antenna connector.
•Select an antenna suitable for the operating
frequency.
•Push [TUNER] for 2 sec. to manually tune the
antenna.
•Check the connection and connection cable
pins.
•Set the CI-V address.
•Connect properly.
•Set [ALC adj] properly.
•Push [AMP/PROTECT] to turn the linear
amplifier ON. (The indicator lights green.)
•Select an antenna suitable for the operating
frequency.
•Push [TUNER] for 2 sec. to manually tune the
antenna.
•Stop the exciter’s transmission, then push
[AMP/PROTECT] to deactivate the protection
circuit.
•Check the antenna SWR. Adjust the antenna,
if necessary.
•Push [TUNER] to turn the antenna tuner ON.
•Select a location with good air circulation.
•Adjust [ALC adj] to the correct position.
REF.
pgs.
7–10
p. 3
p. 6
p. 16
p. 17
pgs.
7–10
p. 13
pgs.
7–10
p. 12
p. 16
p. 16
p. 16
p. 17
p. 6
p. 17
—
p. 12