Troubleshooting - Icom IC-R71A Instruction Manual

SECTION 9 TROUBLESHOOTING
Your IC-R71 has been carefully adjusted at the factory prior to shipping. The chart below has been provided to help you
correct problems which are not equipment malfunctions. If you are unable to locate the trouble, or correct the fault, please
contact your dealer or the nearest ICOM Service Center.
Possible Cause
1. Power does not come on
when the switch is pushed. —
2. No sound comes from the
speaker.
. Sensitivity is low and only
strong signals are audible.
. The "S" meter is higher than
the '0"' position even when
there is no signal.
. Only incomprehensible voices
are heard during SSB recep-
tion.
. The tone of the received signal
is very high or low pitched.
. The frequency does not
change by rotating the Tuning
knob.
. An abnormal figure is dis-
played on the _ frequency
display or fails to illuminate.
. An abnormal out of band
frequency is displayed on the
frequency display.
Power cable is improperly connected.
Blown fuse.
AF GAIN control knob is completely
counterclockwise.
The external speaker cable is con-
nected to the unit but not to the
external speaker jack on the external
speaker.
Headphones are connected to the
PHONES jack.
RF GAIN control knob is turned fully
counterclockwise.
The antenna feed line is cut or shorted.
The Attenuator is ON.
RF GAIN control knob is turned fully
counterclockwise.
Receiving the wrong sideband.
Maladjustment of the P.B. Tune cont-
rol.
DIAL LOCK is engaged.
The Power switch was turned OFF and
ON too quickly.
The memory backup battery (graphite-
lithium battery) on the RAM board is
exhausted.
as |e
Carefully reconnect power cable.
Check for the cause, then replace the fuse
with a spare one.
Turn the knob clockwise to a suitable level.
Connect the cable to the speaker jack on the
external speaker.
Unplug the headphones.
Turn the RF Gain control knob fully clock-
wise.
Check the feed line and correct any im-
proper condition.
Set the PRE/ATT switch to OFF position or
PRE position.
Turn the knob fully clockwise.
Set the sideband opposite the one you are
receiving, either USB or LSB.
Set the P.B. Tune control knob to the clear
tone position, or the center position.
Disengage the DIAL LOCK by pressing the
DIAL LOCK button.
Turn the Power switch OFF, wait 30 se-
conds, and then turn it ON again.
Contact with your dealer or ICOM service
center.