[Elecraft] K3 MCU LD

[Dick Dievendorff]

Please follow the steps in K3 Utility Help, Troubleshooting MCU Load failure. 

Dick, K6KR

Sent from my iPad

On Jul 8, 2012, at 8:46 PM, "Jim Miller KG0KP" <JimMiller at STL-OnLine.Net> wrote:

> I had made several JT65 contacts and a phone contact just prior to this 
> problem.
> 
> K3 hung up (became constant errors appearing to be communications problems) 
> during load of new code from non-updated Utility Program.  Went to website 
> and downloaded new Utility and re-downloaded code.  K3 was now in MCU LD 
> mode.  Utility indicated during port test that the K3 needed a MCU LD.  This 
> only happened once.  After that it was just trying different baud rates on 
> the comm port.  Disconnected PC to P3 cable at P3 and connected directly to 
> K3.  No change.  Removed that cable and used the cable had gone from the P3 
> to the K3.  No change.  Used another PC with a real Comm port and downloaded 
> the K3 Utility to it and tried it direct.  That did not work either. 
> Different PC, different cable, new loads of Utility and K3 code to each PC 
> each direct from the Elecreaft site.  The only common piece here is the K3.
> 
> The K3 initially had to have power unplugged as it was totally froze up 
> after the initial incident.  When powered on, it came up in MCU LD mode on 
> its own.  That is the only time the Utility program said it needed MCU LD. 
> The PCs had been rebooted numerous times during this procedure to insure 
> there wasn't something being assumed by the PC OS or the Utility program. 
> All future times it simply could not communicate, repeatedly trying 
> descending baud rates.
> 
> Looking at the Utility help files on force loading the MCU, it says to leave 
> the K3 without power connected for longer than a few seconds.  This was done 
> for a 35 minute period, no change.  Power on was done by procedure of 
> holding the power switch in until the transmit light starts blinking and the 
> darkened panel shows MCU LD.
> 
> I also removed the top cover and removed and reinstalled the KIO3 bd and the 
> KXV3 bd.  No loose connections.
> 
> I CANNOT talk to it.  Anybody with any ideas, please respond.
> 
> Thanks es 73, de Jim KG0KP
> 
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html