4
MAINTENANCE
15
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
Power does not come
on when the [POWER]
switch is pushed.
• Cable connection is faulty.
• The circuit breaker is turned OFF.
• Check the connection and connection cable
pins.
• Check for the cause, then turn the circuit
breaker ON.
pgs.
7 – 9
p. 3
Sensitivity is low.
• The antenna is not connected properly.
• The antenna for another band is
selected.
• The antenna is not properly tuned.
• Reconnect the antenna connector.
• Select an antenna suitable for the operating
frequency.
• Push [TUNER] for 2 sec. to manually tune the
antenna.
p. 6
p. 13
p. 14
Output power is too
low.
• Reverse connection on the antenna input
and output.
• [ALC adj] is not adjusted properly.
• The linear amplifier circuit is turned OFF.
• The antenna for another band is
selected.
• The antenna is not properly tuned.
• The protector circuit activates and a band
indicator blinks.
• 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.
pgs.
7 – 9
p. 11
p. 13
p. 13
p. 13
p. 14
Protection circuit
activates during short
periods of operation.
• 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.
• 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.
p. 6
p. 14
—
p. 11
Operating band does
not change
automatically.
• Cable connection is faulty.
• The CI-V setting is not properly
programmed.
• Check the connection and connection cable
pins.
• Set the CI-V address.
pgs.
7 – 9
p. 12
■
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 near-
est Icom Dealer or Service Center.
