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2. Connect the RED wire of the accessory cable to the POSITIVE (+) WIRE of your external
speaker.
3. Be certain all wire connections are secure and that all open wires are adequately
covered.
#NOTE: To extend the life of the radio, use waterproof tape to seal electrical connections.
MAINTENANCE AND TROUBLESHOOTING
Due to its rugged design, your radio requires very little maintenance. However, it is a
precision electronic instrument, so you should follow a few precautions:
x 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.
x You are responsible for continued FCC technical compliance of your radio.
x You should arrange for periodic performance checks with your dealer.
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 weather or scan mode.
Make sure you are not trying to transmit on a receive-
only channel (see the channels and frequency tables
beginning on page 37).
Make sure you are transmitting at the correct power
level for this channel (see the channels and frequency
tables beginning on page 37).
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
volume) 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 6).
The display flashes, and I don’t
know why.
The display will flash if the radio is in a watch mode or
in scan mode. Try turning off scanning, Weather Alert
Watch, or Triple/Dual Watch (see page 6.)
I can’t read the display.
Adjust the contrast and backlight brightness level (see
page 16)
The display is too bright at
night.
Adjust the backlight brightness level.
Turn off the radio; hold CALL-MENU button and turn it
back on (see page 16)
UM380_20101221.indd 34 4/13/2011 11:25:18 AM