Uniden MHS550 manual Symptom Cause Remedy

Troubleshooting

SYMPTOM	CAUSE	REMEDY
Won’t power ON.	Low or Discharged battery	Recharge Lithium Ion battery.
	pack.	Replace battery.
		Use alkaline batteries
		temporarily.
When the PTT is pressed -	Bad microphone element	Send in for repair.
TX icon appears and
another radio can hear a
‘click’ but no audio is
heard.
When scanning, radio	A source of noise is	Turn Squelch clockwise to
stops on a particular	nearby.	reduce noise so that scan
channel all the time.		function skips channel or
		remove channel from scan.
There is noise on the	An external noise is being	Turn off the offending device or
receiver that the squelch	generated by some device.	contact the device
will not eliminate.		manufacturer regarding FCC
		Part 15 “unintentional radiator.”
You made arrangements	You and the other user are	Be sure both are using the
to communicate with	using different country	same country mode. Some
another VHF radio on a	modes (USA/CAN/INT)	modes use the same numeric
specific channel, and you		selections. Channel 16, the
cannot hear them.		Distress, Safety, and Calling
		channel is the same on all three
		modes.
You cannot change the	You selected a channel	Change to an unrestricted
transmit power setting.	that is limited to a 1watt	Transmit/receive channel.
	transmit power such as
	channel 13, or you selected
	a ‘receive only’ channel
	such as Weather band.
The SCAN/MEM key does	Cause 1: No channels	Remedy 1: Use the
not start scanning.	have been stored in	SCAN/MEM key to store
	memory.	several selected channel in
	Cause : Squelch is not	memory.
	adjusted correctly.	Remedy : Adjust the Squelch
		setting to a point just below that
		when the background noise
		disappears.
You can hear	The transmit power is set	Use BAND/1/2.5/5W to change
transmissions, but the	to 1W watt.	to a higher transmit power level.
other radio cannot hear
you.

Uniden MHS550 Radio Owner’s Manual 57