NX-320 making beeps

[mmckenna]

That sounds like Alert Tone 7. Might be 2, but 7 will run continuously.

Do you have the radios set up for any sort of paging function? DTMF/MDC1200?

 

[AM909]

Low battery indicator on a freshly-charged battery? You've tried a known-working battery, yes?

Any chance one of the keys (front or side) is stuck?

 

[bjred]

Long time stalker of these forums, lots of great knowledge here by the way. I can finally contribute something.

I've worked on enough of those to know that beeping is the out of lock tone, most often caused by the receive/transmit assist voltages being off. If you are able to, check the receive assist and transmit assist voltages in test mode, they should be 2.5 volts. Check each test frequency because having even just one off can cause this issue.

If there are any off then you can try to manually tune them or click the tune assist voltage button to have the software automatically try to tune it. Hopefully it's as simple as the crystal drifted and the radio just needed to be re-aligned.

If you can't manually tune the voltages or the tune assist voltage can't complete then there's an issue with a component on the board.

 

[mmckenna]

Long time stalker of these forums, lots of great knowledge here by the way. I can finally contribute something.

I've worked on enough of those to know that beeping is the out of lock tone, most often caused by the receive/transmit assist voltages being off.

Good stuff, thanks bjred! Makes much more sense than the track I was taking with this.

I've only got a few NX-x20's on my system, and not had any lose VCO lock. I'll have to remember that.

 

[bjred]

Yeah, not very often the NX-x20s go out of lock. More common are bad filters or popping a BGA IC from them being dropped.

Hopefully it helps itzik with their radios, or someone else that might be searching around.