[Elecraft] K3 not turning off

[JohnK1JD]

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 <btippett at alum.mit.edu>
Subject: Re: [Elecraft] K3 not turning off
To: elecraft at mailman.qth.net
Message-ID: <1272455717487-4974007.post at n2.nabble.com>
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