Uniden UM355, Руководство пользователя

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Maintenance and Troubleshooting
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Maintenance and Troubleshooting
Due to its rugged design, the UM355 requires very little maintenance. However, it is
a precision electronic instrument, so you should follow a few precautions:
• If the antenna has been damaged, you should not transmit except in the case of an
emergency. A defective antenna may cause damage to your radio.
• You should arrange for periodic performance checks with your Uniden dealer.
Common questions
Problem Things to Try
The radio won’t power on. Check the power connections.
Check the fuse.
Check the master battery switch and branch
circuit that connect to the radio.
The radio won’t transmit. Make sure you are not in scan mode.
Make sure you are not trying to transmit on a
receive-only channel (see the channels and
frequency tables starting on page 29).
Make sure you are transmitting at the correct
power level for this channel (see the channels and
frequency tables starting on page 29).
Make sure the duration of each transmission is
less than 5 minutes.
Noise comes out of the
speaker all the time
Adjust the squelch level; it is probably too low.
I can’t hear anything (no vol-
ume) from the speaker.
Adjust the squelch level; it is probably too high.
I can transmit, but no one can
hear me.
Check your UIC channel settings (see Setting the
UIC channel mode (USA/CAN/INT) on page 10).
I can’t read the display. Adjust the dimmer level (see page 17)
The display is too bright at
night.
Adjust the dimmer level level.
(see page 17)
Where can I find my radio’s
serial number?
Look on the bottom side of the radio