I saw one case something like this when something was connected to one of the back panel connections that provided enough voltage to keep the MCU alive (I think it's a 3.3V device)
If you remove all the connectors from the K3 back panel (except the Anderson power pole +12V supply, of course), does the radio shut down reliably? Dick, K6KR -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of JohnK1JD Sent: Thursday, April 29, 2010 5:02 PM To: Elecraft Reflector Subject: Re: [Elecraft] K3 not turning off Bill I suspect that Glenn's K3 turns on OK from the front panel switch, like mine. Glenn Much of May 2009 was spent troubleshooting this exact issue with S/N 071: the inability to power down the K3 from the front panel. Power on is fine. I performed numerous modifications (including the 12v sense, of course), diagnostics/measurements, replacement of a surface mount component, and replaced the FP board twice, all as directed but without resolution. However, the K3 shuts off using the "PS0;" command from the utility program. Given that workaround, my decision was to postpone sending it back for repair to see if a solution appeared over time - maybe something I could do myself. Our problems may not be identical, but if you're interested please contact me off reflector for the extensive troubleshooting email thread. Elecraft support during the troubleshooting phase was excellent, as always, but some issues defy remote diagnoses. If I were willing to part with the beloved K3 for factory repair, the problem would have been resolved a long time ago! 73, John K1JD Date: Wed, 28 Apr 2010 04:55:17 -0700 (PDT) From: Bill W4ZV <[email protected]> Subject: Re: [Elecraft] K3 not turning off To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii Glenn VK4FZ wrote: > > My K3 (S/N 544) is no longer turning off properly....the 12v sense mod is > done, any ideas for further investigation???? > I'd next try the remote Power Off command (PS0) via the K3 Utility. If that works and the power switch does not, then you might have a defective switch. 73, Bill ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
