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11
74
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 near-
est Icom Dealer or Service Center.
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
POWER
Power does not come on
when the [POWER] switch
is pushed.
• DC power cable is improperly connected.
• Fuse is blown.
• Reconnect the DC power cable correctly.
• Check for the cause, then replace the fuse with
a spare one.
(Fuses are installed in the DC power cable and
the internal PA unit.)
p. 17
p. 75
RECEIVE
No sound comes from the
speaker.
• Volume level is too low.
• The squelch is closed.
• The transceiver is in the transmitting condition.
• Rotate [AF] clockwise to obtain a suitable
listening level.
• Rotate [RF/SQL] to 10 o’clock position to open
the squelch.
• Push [TRANSMIT] to receive or check the
SEND line of an external unit, if desired.
p. 2
p. 3
p. 2
TRANSMIT
Transmitting is impossi-
ble.
• The operating frequency is not set to a ham
band.
• Set the frequency to a ham band.
p. 24
Sensitivity is low.
• The antenna is not connected properly.
• The antenna for another band is selected.
• The antenna is not properly tuned.
• The attenuator is activated.
• Reconnect to the antenna connector.
• Select an antenna suitable for the operating
frequency.
• Push [TUNER] for 2 sec. to manually tune the
antenna.
• Push [ATT] one or more times to select “ATT
OFF.”
—
pgs. 5,
45
p. 48
p. 5
Receive audio is distorted.
• The operating mode is not selected correctly.
• PBT function is activated.
• Noise blanker function is activated.
• Preamp is activated.
• The noise reduction is activated and the [NR]
control is set too far clockwise.
• Select a suitable operating mode.
• Push [PBT CLR] for 2 sec. to reset the function.
• Push [NB] to turn the function OFF.
• Push [P.AMP] once or twice to turn the function
OFF.
• Set the [NR] control for maximum readability.
p. 26
p. 26
p. 27
p. 5
p. 27
The [ANT] switch does not
function.
• The antenna switch has not been activated.
• Set the antenna switch in set mode to “Auto” or
“Manual.”
p. 45
SCAN
Programmed scan does
not stop.
• Squelch is open.
• [RF/SQL] is assigned to RF gain control and
squelch is open.
• Set [RF/SQL] to the threshold point.
• Reset [RF/SQL] control assignment and set it to
the threshold point.
p. 3
pgs.
3, 68
Output power is too low.
• [RF POWER] is set too far counterclockwise.
• [MIC GAIN] is set too far counterclockwise.
• The antenna for another band is selected.
• The antenna is not properly tuned.
• Rotate [RF POWER] clockwise.
• Set [MIC GAIN] to a suitable position.
• Select an antenna suitable for the operating
frequency.
• Push [TUNER] for 2 sec. to manually tune the
antenna.
p. 3
p. 2
p. 5
p. 48
No contact possible with
another station.
• RIT or
∂
TX function is activated.
• Split frequency function and/or dualwatch are
activated.
• Push [RIT] or [
∂
TX] to turn the function OFF.
• Push [SPLIT] and/or [DUALWATCH] to turn the
function OFF.
p. 6
pgs. 7
31, 32
Transmitted signals are
distorted.
• [MIC GAIN] is set too far clockwise.
• Set [MIC GAIN] to a suitable position.
p. 2
Repeater cannot be
accessed.
• Split frequency function is not activated.
• Programmed subaudible tone frequency is
wrong.
• Push [SPLIT] to turn the function ON.
• Reset the frequency using set mode.
p. 7
p. 46
Programmed scan does
not start.
• The same frequencies have been programmed
in scan edge memory channels P1 and P2.
• Program different frequencies in scan edge
memory channels P1 and P2.
p. 52
Memory scan does not
start.
• 2 or more memory channels have not been
programmed.
• Program 2 or more memory channels.
p. 52
Select memory scan does
not start.
• 2 or more memory channels have not been
designated as select channels.
• Designate 2 or more memory channels as select
channels for the scan.
pgs. 51,
59