Troubleshooting - Icom IC-9700 Basic Manual

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.
PROBLEM
Power does not turn ON
when is pushed.
POWER
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.
Transmit signal is unclear
or distorted in the SSB
mode.
Received audio in the
SSB mode is unclear or
distorted.
POSSIBLE CAUSE
The power cable is not connected
properly.
The external power supply is turned OFF. Turn ON the external power supply.
The DC power cable fuses or circuitry
fuse are blown.
The function that mutes the received
audio of the SUB band is turned ON.
The audio level is too low.
The squelch is closed.
Headphones are connected.
In the FM mode, the Tone Squelch
function is turned ON.
The attenuator is activated.
RF gain control is activated.
( 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 transmit output power is set too low. Adjust the RF POWER in the Multi-
The modulation input signal level is set
too low.
The output power is limited because of
power amplifier protection.
The microphone is bad, or the [MIC]
connector is shorted or defective.
The antenna SWR is more than 3:1.
The transceiver's microphone gain is too
high.
The desktop microphone gain is too high.
The incorrect sideband is selected.
The PBT function is activated.
SOLUTION
Reconnect the DC power cable properly. p. 2-1
Find and repair the cause of the problem,
and then replace the damaged fuse with
a new one.
Turn OFF the Sub Band Mute function.
Rotate
AF RF/SQL
obtain a suitable listening level.
Rotate
AF RF/SQL
o'clock position to open the squelch.
Disconnect the headphones.
Turn OFF the Tone Squelch function.
Turn OFF the attenuator.
Set the RF gain higher until RFG just
goes off.
( disappears.)
Repair the problem and then reconnect
the antenna.
Connect an antenna suitable for the
operating band.
Rotate
AF RF/SQL
o'clock position to open the squelch.
Push to turn OFF the VOX
VOX/BK-IN
function.
Adjust the VOX gain.
function menu.
Adjust the microphone gain in Multi-
function menu.
Stop transmitting, and then wait without
turning off the transceiver until the
temperature of the power amplifier FET
drops sufficiently.
Test the microphone and check the [MIC]
connector.
Adjust the antenna for an SWR of less
than 3:1.
Adjust the MIC GAIN level so that the
meter reading swings between 30 and
50% of the ALC scale.
Toggle between USB and LSB.
Hold down MULTI
clear.
10-6
MAINTENANCE
REF�
p. 10-1
p. 8-2
p. 3-1
(inner) clockwise to
(outer) to the 12
p. 1-1
–
p. 4-1
p. 3-10
p. 13-3
p. 3-10
(outer) to the 12
–
p. 3-10
p. 3-11
p. 3-10
p. 13-3
p. 3-11
p. 3-11
p. 3-3
p. 4-3
, and then set to
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21