Icom IC-705, Basic Manual, Page: 80 / 96

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