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:
•
If the antenna has been damaged, do not transmit except in an
emergency situation. Transmitting with a defective antenna may cause
further radio damage.
Common Questions
Problem
Things to try
The radio won’t turn on.
Charge the radio.
The power LED on the
charger doesn’t turn on.
• Don’t use the charger when the
ambient temperature is below 5° C (41°
F) or above 40° C (104° F).
• Make sure the charging contacts on the
radio and charger are clean.
• Replace the battery.
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
or transmit at the wrong power level
for this channel (see the channel lists
starting on page 33).
• Check the battery power level; if it’s
low, charge the battery before trying to
transmit.
• Make sure the duration of each
transmission is less than 5 minutes
(VHF Marine) or 3 minutes (UHF CB).
I can’t hear anything from
the speaker.
Adjust the squelch level; it is probably too
high.
The sound is muffled or
the volume is low.
Clear water from the speaker grill.
Noise comes out of the
speaker all the time.
Adjust the squelch level; it is probably
too low.
29
UHF CB+VHF Marine Radio
UNIDEN MHS157
