Motorola CP100 help

[Joe549]

I just acquired a pair of CP100 used, radios only nothing else. I found the manual online and based on what I've read they seem to be the 15 channel model....

Problem. One of them does not work properly. The first issue was turning it on, but I seem to have solved that, at least temporarily, with a wedge of paper between the batteries and the side of the case. Second problem.. When you push the PTT button it just makes a continuous tone. Does the same thing on all the channels. Nothing transmits to the other unit. When I key up the other unit the first one does not receive anything yet it shows the flashing signal strength indicator display in the corner but no sound from the speaker.

I have completed the factory default reset, (push and hold PTT and Menu button, turn on wait for sound/3 seconds, release) on both units. No change.

I believe that these are pre-programed with frequencies that cannot be changed..?? I checked the frequency list in the manual and programed a bunch of them into my scanner, Uniden BC370CRS, but still got no signal from the one working unit. Tried on my Baofeng UV82 as well, same result.....

I'm out of ideas....

 

[Joe549]

Managed to find a couple of the programed channels... Still can't determine what the problem with the second unit is. Anyone know why it would be just making a continuous tone when keyed up? It's the same tone that our radios at work make when you switch to a channel that isn't programed, only they do it as soon as switched to that channel, no need to press the PTT button. The seller indicated to me that both units were working when he sold them...

 

[com501]

The radio is out of lock. Check for a bad crystal (very common).