Icom IC-701

11. The teft side of the unit case | As the left side of the case is used as a heat | Make sure that the area around the unit has as
becomes a little hot. sink for the transmitter driver transistor, | much ventilation as possible.
even during normal operation, it may get as
hot as 35°C (63°F) above room tem-
perature.
12. The heat sink on the rear panel
becomes hot.
The heat sink on the rear panel is for the
final transistors and may become as hot as
40°C (72°F) above room temperature.
Make sure the area around the unit has as much
ventilation as possible.
13. Hot air suddenly or occationally
eliminates from the heat sink on
the rear panel.
The cooling fan has been automatically
triggered ON due to the temperature of the
final transistors.
This is a normal condition and you may continue
operation. However, if the fan starts running at
high speed and the frequency display LED’s and
meter lamps start blinking, discontinue operation
immediately, allow the heat sink to cool and check
to see that you have the best ventilation possible,
or correct a high SWR condition, etc.
Insufficient ventilation of the heat sink on
the rear panel.
14. Frequency display LED’s and
the meter lamps start blinking,
and the fan starts running at high
speed.
Make sure the heat sink on the rear panel has as
much ventilation as possible, after stopping transmit
operation and allowing the heat sink to cool.
Long operation on RTTY or CW. Reduce the RF output power by turning the COMP
control knob counterclockwise, or set the unit in
the receive mode as quickly as possible.
Excessive antenna SWR.
Check the antenna feed line and correct any
improper condition of mismatch.
15. The RIT LED goes out even
though you did not depress the
RIT ON/OFF switch to turn it
OFF. Depress the RIT ON/OFF switch again to turn
ON the RIT.
16. The frequency does not change | DIAL LOCK is engaged. Disengage the DIAL LOCK by pressing the DIAL
by rotating the Tuning knob. LOCK button.
The DIAL FAST button was depressed | Set the Tuning dial so that one of the large
when the Tuning knob was set with one of | increments is at the center point, and push the
the small increments at the center point, | DIAL FAST button TWICE, and the scale will be
the Tuning knob was rotated when the | calibrated.
DIAL LOCK was engaged, or the dial was
rotated beyond the band edge.
The RIT is automatically turned OFF when
the Tuning Knob is rotated.
You may change the unit so that the automatic
RIT OFF function does not operate when you
rotate the Tuning knob. (See page 13.)
The Power switch has been turned OFF,
17. The scale on the Tuning knob is
not in calibration with the
displayed frequency.
18. The last two digits of the
memorized or displayed fre-
quency has changed to 0.0.
The DIAL FAST button was pressed, or the
VFO Select switch was turned while in the
DIAL FAST mode.
Release the DIAL FAST function by pressing the
DIAL FAST button again, and set the unit to the
desired frequency with the Tuning knob.
The Power switch was turned OFF and ON
too quickly.
. An abnormal figure is displayed
on an LED, or an LED fails to
illuminate.
Turn the Power switch OFF, wait a few seconds,
and then turn it ON again.
. An unusual amount of distortion
and/or noise in the transmit
signal.
The MIC GAIN is too high when the RF
Speech Processor is ON.
While watching the meter in the COMP mode, turn
the MIC GAIN control counterclockwise so that
the meter indicates approximately 0 dB at the
voice peak.
Unable to key when using an
electronic keyer.
The Switching circuit of the electronic keyer
does not close completely.
Replace the keyer with one having a voltage of less
than 0.4V between the two keying lines at the key
down position, or modify your keyer so that the
voltage is less than 0.4 Volts.
Polarity of the connection wires from the
keyer is reversed.
The MODE switch is not in the CW or CW-N
position.
Connect the keyer wires observing proper polarity.
Place the MODE switch in the CW or CW-N
position.
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