Troubleshooting - Icom IC-705 Basic Manual

10
MAINTENANCE

Troubleshooting

The following chart is designed to help you solve problems that 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
nearest Icom Dealer or Service Center.
LSee the Advanced Manual for the problems when communicating through a repeater.
L"AM" indicates the PDF type Advanced Manual.
Problem
Power does not turn ON when
is pushed.
No sound is heard from the
speaker.
Sensitivity is too low, and only
strong signals are heard.
The transceiver automatically
switches to transmit while
receiving.
No power output or the output
power is too low.
Possible Cause
The battery pack is exhausted.
Loose connection of a battery
pack.
The power cable is not connected
properly.
The external power supply is
turned OFF.
A DC power cable fuse is blown.
The audio level is too low.
The squelch is closed.
The external speaker is
connected.
The Bluetooth headset is
connected.
In the FM mode, the Tone
Squelch function is turned ON.
The Attenuator is activated.
RF gain control is set too low.
("RFG" is displayed.)
The antenna is defective, or the
coaxial cable is defective.
You are using an antenna that
is not suitable for the band you
have selected.
The squelch is closed.
The VOX function is ON.
The VOX gain is set too high.
The operating frequency is
outside a ham band.
The battery pack is exhausted.
The transmit output power is set
too low.
The modulation input signal level
is set too low.
The output power is limited
because of power amplifier
protection.
10-3
Solution
Charge the battery pack.
Clean the battery pack terminals.
Reconnect the DC power cable
properly.
Turn ON the external power
supply.
Find and repair the cause of the
problem, and then replace the
damaged fuse with a new one.
Rotate clockwise to
obtain a suitable listening level.
Adjust the squelch level.
Disconnect the external speaker.
Disconnect the Bluetooth
headset.
Turn OFF the Tone Squelch
function.
Turn OFF the Attenuator.
Set the RF gain higher until
"RFG" just goes off.
Repair the problem and then
reconnect the antenna.
Connect an antenna suitable for
the operating band.
Connect an external antenna
tuner, and tune the antenna.
Adjust the squelch level.
Push to turn OFF the VOX
function.
Adjust the VOX gain.
Set the frequency to a ham band.
Charge the battery pack.
Adjust the RF POWER in the
Multi-function menu.
Adjust the MIC GAIN level in the
Multi-function menu.
Stop transmitting, and then wait
until the temperature of the power
amplifier FET drops sufficiently.
REF.
p. 1-2
–
p. 13-1
–
p. 10-1
p. 3-1
p. 3-8
–
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AM
p. 4-1
p. 3-8
–
p. 13-3
–
p. 3-8
AM
p. 3-3
p. 1-2
p. 3-9
p. 3-10
AM