User's Manual

DP405 Digital Two-way Radio User Manual
15
8 Trouble shooting
No.
Problem
Cause and Solution
1
Failed to power on
A. The battery is used up –charge the battery or change to
a new battery;
B. Volume switch is faulty – repair at the specified service
station;
2
Small voice during
call
A. speaks too far from the microphone – the ideal distance:
3-10cm；
B. wrong volume setting – turn the volume knob clockwise
to increase the volume;
3
Failed to transmit
or receive
A. wrong channel parameters – reset the parameters and
try again;
B. the group identity for default contact is wrong – select a
right group;
C. Beyond the communication scope.