Maintenance; Troubleshooting; D Transceiver Power; D Transmit And Receive - Icom IC-i7410 Instruction Manual

■ Troubleshooting

The following chart is designed to help you correct
problems which are not equipment malfunctions.

D Transceiver power

PROBLEM
Power does not turn ON
when the [POWER] switch is
pushed.

D Transmit and receive

PROBLEM
No sound from the speaker.
Sensitivity is too low, and only
strong signals are audible.
Received audio is unclear or
distorted.
[ANT•METER] does not func-
tion
Transmitting is impossible.
Output power is too low.
No contact can be made with
another station.
Transmit signal is unclear or
distorted.
Repeater cannot be accessed. • The Split function is not turned ON.
POSSIBLE CAUSE
• The power cable is improperly connected.
• A fuse is blown.
POSSIBLE CAUSE
• The audio volume level is too low.
• The squelch is closed.
• The transceiver is in transmit.
• The antenna is not connected properly.
• The antenna for another band is selected.
• The antenna is not properly tuned.
• The attenuator is turned ON.
• The operating mode is not matched.
• The Passband Tuning function is turned ON.
• The Noise Blanker function is turned ON when
receiving a strong signal.
• Preamplifier is turned ON.
• The Noise Reduction function is turned ON
and the [NR] control is too far clockwise.
• The Antenna Switch function is set to "OFF."
• The operating frequency is outside the se-
lected ham band.
• The [RF PWR] control is set too far counter-
clockwise.
• The [MIC] control is set too far counterclock-
wise.
• The antenna for another band is selected.
• The antenna is not properly tuned.
• The RIT or ∂TX function is turned ON.
• The Split function is turned ON.
• The [MIC] control is set too far clockwise.
• The programmed subaudible tone frequency
is wrong.

MAINTENANCE

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.
SOLUTION
• Re-connect the DC power cable correctly.
• Correct the cause, then replace the fuse with
an equivalent fuse.
( Fuses are installed in the DC power cable
and in the internal PA unit.)
SOLUTION
• Rotate the [AF] control clockwise to obtain a
suitable listening level.
• Rotate the [RF/SQL] control to 11 o'clock po-
sition to open the squelch.
• Push [TRANSMIT] to receive or check the
SEND line of an external unit, if connected.
• Re-connect to the antenna connector.
• Select an antenna suitable for the operating
frequency.
• Hold down [TUNER] for 1 second to manually
tune the antenna.
• Push [P.AMP/ATT] to turn OFF the attenuator.
• Select a suitable operating mode.
• Hold down [PBT-CLR] for 1 second to reset
the function.
• Push [NB] to turn OFF the function.
• Push [P.AMP/ATT] once or twice to turn OFF
the function.
• Set the [NR] control for maximum readability.
• Set the Antenna Switch function to "Auto" or
"Manual" in the Set mode.
• Set the frequency to be within the selected
ham band.
• Rotate the [RF PWR] control clockwise.
• Set the [MIC] control to a suitable position.
• Select an antenna suitable for the operating
frequency.
• Hold down [TUNER] for 1 second to manually
tune the antenna.
• Push [RIT] or [∂TX] to turn OFF the function.
• Push [SPLIT] to turn OFF the function.
• Set the [MIC] control to a suitable position.
• Push [SPLIT] to turn ON the function.
• Reset the frequency using the Set mode.
13
REF.
p. 19
p. 99
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2
REF.
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p. 31
4
p. 32
p. 34
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p. 82
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p. 83
p. 55
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p. 31
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p. 55
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p. 26
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p. 34
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p. 83
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