Manual Icom IC-7300 (page 136 of 173) (English)

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14-5

MAINTENANCE

Troubleshooting

The following chart is designed to help you correct problems which 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

POSSIBLE CAUSE SOLUTION REF.

Power does not come

on when

POWER

pushed.

Power cable is improperly

connected.

Reconnect the DC power cable

correctly.

p. 2-4

The external power supply is turned

OFF.

Turn ON the external power supply. p. 2-4

The DC power cable fuses or

circuitry fuse are blown.

Find and repair the cause of the

problem and then replace the

damaged fuse with a new one.

p. 14-2

No sound is heard from

the speaker.

Audio level is too low.

Rotate

AF RF/SQL

(inner) clockwise

to obtain a suitable listening level.

p. 3-2

The squlech is closed.

Rotate

AF RF/SQL

(outer) to the 12

o’clock position to open the squelch.

p. 3-10

The tone squelch is ON in the FM

mode.

Turn OFF the Tone squlech. p. 4-30

An external speaker or headphones

are connected to [PHONES] jack.

Disconnect the head-phone or

external speaker.

p. 2-2

The external speaker cable is cut. Check the external speaker cable

and repair it.

–

Sensitivity is too low,

and only strong signals

can be heard.

The attenuator is activated. Turn OFF the attenuator in the

FUNCTION screen.

p. 4-3

The squlech is closed.

Rotate

AF RF/SQL

(outer) to 12

o’clock position to open the squelch.

p. 3-10

The antenna is defective or the

coaxial cable connector is shorted

or cut.

Repair the problem and then

reconnect to the antenna connector.

p. 2-3

You are using an antenna not

suitable for the band you have

selected.

Connect an antenna suitable for the

operating frequency.

p. 2-3

Hold down

TUNER

to tune the

antenna.

p. 11-2

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. 3-4

The modulation input signal level is

set too low.

Adjust the microphone gain in the

Multi-function menu.

p. 3-11

The microphone is bad, or the [MIC]

connector is shorted.

Try to transmit in the FM, CW, or

RTTY mode to check whether the

microphone or the transceiver has a

problem.

p. 3-3

The antenna SWR is more than 3:1. Adjust the antenna for an SWR of

less than 3:1.

p. 11-2

The antenna is not properly tuned.

Hold down

TUNER

for 1 second to

tune the antenna.

p. 11-2

TX power is set too low. Adjust the RF POWER in the Multi-

function menu.

p. 3-11

is there available a wiring pictorial chart for the small internal ic-7300 coaxial jumper cables?
ie: from the RF unit to the PA board? tnx Sam in Alabam KF4TXQ Submitted on 2-1-2022 at 06:09
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Icom IC-7300 Manual

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