CM300 Unassigned

[ajmanz]

Anybody ever seen a CM300 locked up with UNASSIGNED on the display and a solid steady tone? The only way to clear it is to power cycle the radio off and on. It's usually good for a bit but then does it again. I'm probably going to send it out to Moto but thought I'd ask around first.

Thanks!

 

[TampaTyron]

I have seen that when the radio is connected to a TRA (Tone remote adapter) or Telex IP223, where thos devices are commanding the radio to change to a specific channel. If the channel is not assigned OR if the programming in the radio/tone remote is wrong, it will command the radio to a channel that does not exist. Also, if the cable/wiring connecting the radio to the device is damaged, the radio could see a command on the wrong wire, thus getting the unassigned display. Basically, the radio uses up to 4 wires to signal up to 16 channels via binary. TT

 

[TampaTyron]

After further thought, is the firmware up to date on the radio? And what is it connected to via its accessory connector? If not connected to anything, is the accessory connector in good shape? TT

 

[ajmanz]

The only thing connected to the accessory connector is a speaker. The same speaker that has been connected for 6 months. Could it have taken a power hit or something?

 

[firefive76]

Does it normally do this right after transmitting or just intermittently?

Edit: If it does this right after transmitting, you have an antenna or coax problem. We had one doing this, and upon further inspection, found a bad place in the coax. RF blowing back into the radio was causing the problem.

 

[ajmanz]

It does it randomly. It can be scanning for hours and working fine and then all of a sudden it goes to a steady tone and says unassigned on the screen.