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47
10
MAINTENANCE
9
10
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Troubleshooting
If your transceiver seems to be malfunctioning, please check the following points before sending it to a service center.
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
The transceiver’s power
will not turn ON.
No sound comes from the
speaker.
Sensitivity is low and only
strong signals are audible.
No contact possible with
another station.
Frequency cannot be set.
Scan does not operate.
Transmission is automati-
cally cut off.
• Power connector has a poor contact.
• Polarity of the power connection is reversed.
• Blown fuse.
• Volume is too low.
• The volume level is set to 0 (audio muting).
• Squelch is set too high.
• A selective call or squelch function is activated
such as pocket beep or tone squelch.
• Antenna feedline or the antenna connector has a
poor contact or is short circuited.
• The other station is using tone squelch.
• The lock function is activated.
• Priority scan is paused on the watching fre-
quency.
• The channel selection mode is not set.
• The squelch is open.
• Priority scan is activated.
• Time-out timer function is activated.
• Check the connector pins.
• Re-connect the power cable observing the proper
polarity.
• Check the cause, then replace the fuse.
• Push
.
• Push
.
• Set the squelch level to the threshold.
• Turn the appropriate function OFF.
• Check, and if necessary, replace the feedline or
solder the antenna connector again.
• Turn the tone squelch function ON.
• Push and hold
LOW
for 2 sec. to deactivate the
lock function.
• Push
SCAN
TAG
to cancel the scan.
• Push
CH
SQL
to enter the channel selection mode.
• Set the squelch to the threshold point.
• Cancel the scan.
• Set the timer to OFF.
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IC-440-1.indd 47
IC-440-1.indd 47
2008/06/25 15:59:46
2008/06/25 15:59:46