[arm-allstar] Weird URI problem

[David McGough]

Hi Pat,

Is this system a BeagleBone Xm or BBB? 

If it's a BBB, how are you powering it (e.g.: A DC-DC converter)??  The
BBB is very sensitive to the +5VDC power source and -any- USB related
power spikes can cause the condition you're describing.

73, David KB4FXC



On Sat, 14 Nov 2015, KH6KL wrote:

> 11.14.2015
> I'm not sure which board to post this on...
> 
> My repeater is a Motorola R1225, 25Watts, w/ PL. The computer is a 
> BeagleBoneBlackC. I'm only using the COS, PTT, Rx Audio, Mic and ground. 
> This system has been working on the AllStar Network since May 2015.
> 
> About 2 months ago a weird problem started: The Xm hangs on, but PTT 
> voltage is at 5v. The URI red led is off. If I just wait the timeout 
> timer kills the Xm but the the PTT doesn't work until I reset the 1225. 
> The Rptr Rx led is off the whole time, so there's no incoming signal. 
> This only happens when the URI is connected to the accessory plug. I put 
> my spare R1225 on-line and the same thing happens.
> 
> Note: I have everything working off of an Astron SS30 power supply. I 
> looked for ground loops, but didn't find any.
> 
> I borrowed an URI and the system worked perfectly. I returned the URI 
> and put the repeater on-line/stand-alone for two weeks with no problems.
> 
> I sent the URI back to DMK engineering and it passed their test, so it 
> was returned to me. I put it on line and the same problem started again. 
> I swapped the the two URIs and my machine worked perfectly but the other 
> machine started to kerchunking by itself. I returned the borrowed URI, 
> and put my machine on-line/stand-alone.
> 
> I would like to know if anyone has had this problem and what was your 
> solution.
> 
> I called DMK engineering to see if they would warranty the URI, no 
> decision yet, but I ordered a new URI to get this node working.
> 
> Aloha,
> Pat
> KH6KL
> 
> 
>