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CDM750 BOOP BOOP on powerup no lights

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kb5udf

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I received, to tinker with, a CDM750 VHF and UHF with attatched RIC apparently used as a crossband
repeater by a silent key ham. The UHF radio functions as expected. The VHF gives a "boop boop" two tones on powerup and no lights on display/buttons. I can't seem to read this radio either.

Any ideas? I am not very familiar with this series of radios.

Thanks,

JB
 

radioman2001

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Possibly a bad head, use the head from the other radio to confirm, but that's what it sound like or wrong head type installed. If you have an accy programming cable try reading it that way. BTW you don't even need a head installed for the radio to operate. My cross band radios are headless. No need to waste a 1550 head on a radio that sits in a box.
 

kb5udf

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fail self test

Upon research, it appears that the tone fit the manual of failing self test:

Long short, long short but I'm not entirely certain.

Are you saying there is a programming cable that can work on the accessory port on the rear? I'm not familiar with that.

Thanks
 
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