Bedienungsanleitung Icom IC-756PROII (Seite 77 von 88) (Englisch)

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MAINTENANCE

SCAN

■ 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 near-

est Icom Dealer or Service Center.

PROBLEM POSSIBLE CAUSE SOLUTION REF.

RECEIVE

POWER

TRANSMIT

Power does not come on

when the [POWER] switch

is pushed.

No sounds come out from

the speaker.

Sensitivity is too low, and

only strong signals are au-

dible.

Received audio is unclear

or distorted.

The [ANT] switch does not

function

Transmitting is impossible.

Output power is too low.

No contact possible with

another station.

Transmit signal is unclear

or distorted.

Repeater cannot be ac-

cessed.

Programmed scan does

not stop.

Programmed scan does

not start.

Memory scan does not

start

Select memory scan does

not start

• Power cable is improperly connected.

• Fuse is blown.

• Volume level is too low.

• The squelch is closed.

• The transceiver is in transmitting condition.

• The antenna is not connected properly.

• The antenna for another band is selected.

• The antenna is not properly tuned.

• The attenuator is activated.

• Wrong operating mode is selected.

• PBT function is activated.

• Noise blanker is turned ON when receiving a

strong signal.

• Preamp is activated.

• The noise reduction is activated and the [NR]

control is too far clockwise.

•The antenna switch has not been activated.

•The operating frequency is not set to a ham

band.

• [RF POWER] is set too far counterclockwise

• [MIC GAIN] is set too far counterclockwise

• The antenna for another band is selected.

• The antenna is not properly tuned.

• RIT or ∂TX function is activated.

•Split frequency function and/or dualwatch are

activated.

• [MIC GAIN] is set too far clockwise

• Split frequency function is not activated.

• Programmed subaudible tone frequency is

wrong.

• Squelch is open.

•[RF/SQL] is assigned to RF gain control and

squelch is open.

•The same frequencies have been programmed

in scan edge memory channels P1 and P2.

•2 or more memory channels have not been

programmed.

•2 or more memory channels have not been

designated as select channels.

• Re-connect the DC power cable correctly.

• Check for the cause, then replace the fuse with

the spare one.

(Fuses are installed in the DC power cable and

the internal PA unit.)

• Rotate [AF] clockwise to obtain a suitable lis-

tening level.

• Turn [RF/SQL] to 10 o’clock position to open the

squelch.

• Push [TRANSMIT] to receive or check the

SEND line of an external unit, if desired.

• Re-connect to the antenna connector.

• Select an antenna suitable for the operating fre-

quency.

• Push [TUNER] for 1 sec. to manually tune the

antenna.

• Push [ATT] several times to select “ATT OFF.”

• Select a suitable operating mode.

•Push [PBT CLR] for 1 sec. to reset the function.

• Push [NB] to turn the noise blanker OFF.

•Push [P.AMP] once or twice to turn the function

OFF.

• Set the [NR] control for maximum readability.

•Set the antenna switch in set mode to “Auto” or

“Manual.”

• Set the frequency to a ham band.

• Rotate [RF POWER] clockwise.

• Set [MIC GAIN] to a suitable position.

•Select an antenna suitable for the operating fre-

quency.

•Push [TUNER] for 1 sec. to manually tune the

antenna.

• Push [RIT] or [∂TX] to turn the function OFF.

•Push [SPLIT] and/or [DUALWATCH] to turn the

function OFF.

• Set [MIC GAIN] to a suitable position.

• Push [SPLIT] to to turn the function ON

• Reset the frequency using set mode.

• Set [RF/SQL] to the threshold point.

•Reset [RF/SQL] control assignment and set it to

the threshold point.

•Program different frequencies in scan edge

memory channel P1 and P2.

• Program more than 2 memory channels.

•Designate more than 2 memory channels as se-

lect channels for the scan.

p. 17

p. 76

p. 2

p. 3

p. 2

—

pgs. 5,

p. 49

p. 5

p. 25

p. 27

p. 5

p. 26

p. 46

p. 23

p. 3

p. 2

p. 5

p. 49

p. 6

pgs. 7,

31, 32

p. 2

p. 7

p. 47

p. 3

pgs. 3,

p. 53

pgs. 52,

IC-756PROII.qxd 02.1.8 15:52 Page 75

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