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Syn-Tech III P25 Mobile Radio
OPERATION MANUAL
680-090-2041
Version 5.0
http://www.midlandradio.com
57
7 TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE(s) SOLUTION(s)
No display on LCD
when radio is
turned on.
Fuse is blown or
connections are insecure.
Check fuse and connections.
No sound from
Loudspeaker
Volume level is too low.
or
Squelch level is too high.
or
Radio is set for external
accessory.
Adjust volume level.
or
Adjust squelch level.
or
Turn off external acc.
or
Check speaker connections
No response to key
press.
Key lock is on. Unlock the keypad.
No answer to calls.
Out of range of other
stations or signal is blocked
by terrain.
Switch to H (High) output
power.
or
Move closer until you have a
“line-of-sight” to the other
station.
Radio to PC
connection fails.
Serial port is set for GPS
receiver.
Change serial port selection to
“DATA”.