CDM1550LS+ Synth Unlock

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NSPD
Posts: 1626
Joined: Sun Aug 04, 2002 4:52 pm
What radios do you own?: Motorola FR50!

CDM1550LS+ Synth Unlock

Post by NSPD »

I have a 200mhz CDM1550LS+ in my vehicle that all of a sudden today began showing SYNTH UNLOCK on the display and making a low error tone when I try to transmit. I can transmit fine, but when I unkey the mic, it goes into the error. Changing the channels or cycling the power fixes the problem until I try to transmit again. The radio has been working fine in my vehicle for the last year, and I haven't had this problem before.

Anyone ever seen this?
Jake
jims123
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Posts: 31
Joined: Thu Sep 24, 2009 12:09 pm
What radios do you own?: HT1250,750.cdm750.1250 1550XT2

Re: CDM1550LS+ Synth Unlock

Post by jims123 »

Try to reloade radio program if this don`t work try firmware, this problem is cause by rapid current drain during start-up or jump start other vehicle... protect your ingnition circuit with a diode or a fuse..
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