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Motorola CDM1250 UHF Radio

My son just bought the above reference product. He proceeded to power it up by connecting to a bench inverter that he uses forhis other radios/scanners. Nothing happened. He checked the in-line fuse and it was blown. After replacing the fuse he decided to try another power source. The unit was connected to a car battery. Again, nothing happened except a small puff of smoke from the rear of the unit and another blown fuse. At this point he decided he needed some help. I understand there is an internal fuse on the circuit board. Is that easily accessible/repairable?

Renard Sanders

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Renard, just offhand without see'ing the unit, I'd say that something got sparked wrong in the hookup process. The taletell "puff of smoke" tells me the protection circuit or protector diode got "smoked" in the process. It's more than a fuse now, the protection circuit is blowing the fuse, to stop further damage. I'd say that, at least the protector diode needs changed and to check out for any other damage. Probably need a good tech to visually "check" the unit thruout. Definately needs to have it put on the meters and guages to fix all the damage at one time, something that cannot be done by talking you thru it,,, Mechanic

Posted on Feb 09, 2008

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