Maintenance; Troubleshooting; Fuse Replacement - Icom IC-2300H Instruction Manual

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13

MAINTENANCE

■

Troubleshooting

If your transceiver seems to be malfunctioning, please check the followings before sending it to the service center.
PROBLEM
No power comes on.
No sound comes from the
speaker.
Sensitivity is low and only
strong signals are audible.
No direct contact possible
with other stations.
Repeater cannot be ac-
cessed.
Frequency cannot be set.
Frequency cannot be set
using the microphone.
Some memory channels
cannot be selected using
the microphone keypad.
Scan does not start.
Transmission is automatically
cut off.
Transmission continues even
when the PTT is released.
The function display shows
erroneous information.

■ Fuse replacement

If the fuse is blown or the transceiver stops functioning,
fi nd the source of the problem if possible, repair the
problem and then replace the damaged fuse with a new
rated one (FGB 20 A), as shown at right.
POSSIBLE CAUSE
• Power connector has a poor contact.
• Polarity of the power connection is re-
versed.
• Blown fuse.
• Volume is too low.
• The audio mute function is activated.
• Squelch is set too tight.
• A selective call or Squelch function is
activated such as pocket beep or tone
squelch.
• Antenna feedline or the antenna con-
nector solder has a poor contact or is
shorted.
• The S-meter Squelch or Squelch At-
tenuator function is activated.
• The other station is using tone squelch.
• The transceiver is set to duplex.
• Wrong frequency offset is programmed.
• Wrong subaudible tone frequency is pro-
grammed.
• The frequency lock function is activated.
• Priority watch is paused on the watching
frequency.
• The frequency lock function is activated.
• Priority watch is paused on the watching
frequency.
• The input channel number has not yet
been programmed.
• The squelch is open.
• Only one memory channel is programmed
or other channels are set as skip channels.
• Priority watch is activated.
• Time-out timer is activated.
• One-touch PTT function is activated.
• The CPU is malfunctioning.
SOLUTION
• Check the connector pins.
• Re-connect the power cable observing the
proper polarity. Replace the fuse if blown.
• Check the cause, repair it, then replace the
fuse following the instruction below.
• Rotate [VOL] clockwise.
• Push any switch or key to deactivate it.
• Set the squelch level to the threshold.
• Turn OFF the those functions.
• Check, and if necessary, replace the feedline
or re-solder the antenna connector.
• Set [SQL] to between the 10 and 12 o'clock
position.
• Turn OFF the S-meter squelch or squelch at-
tenuator.
• Set the appropriate tone frequency or code,
and then turn ON the tone or DTCS squelch.
• Select the simplex mode.
• Correct the frequency offset.
• Correct the subaudible tone frequency.
• Turn the function OFF.
• Cancel the watch.
• Turn the function OFF.
• Cancel the watch.
• Rotate [DIAL] to check whether the channel
has been programmed or not.
• Set the squelch to the threshold point.
• Program other memory channels or cancel
the memory skip function in the desired chan-
nels.
• Cancel the watch.
• Turn OFF the timer.
• Turn OFF the function.
• Reset the CPU.
55
REF.
p. iv
–
–
p. 8
p. 9
p. 8
pp. 39,
p. v
p. 8
p. 9
p. 41
p. 12
p. 15
p. 13
p. 7
p. 35
p. 7
p. 35
–
p. 8
pp. 17,
p. 35
p. 48
p. 11
p. 52
20 A
fuse
00
41
32