K3 power down problem
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Hi all,
For some reason my K3 will not switch off this morning. I hit the power off button and it powers down and starts again immediately. Obviously it goes off when I power the PSU down but it is somewhat annoying. I have reinstalled the firmware in case of corruption but have not as yet done a full reset. Any ideas? 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC & HB9DRV-9 DX Clusters Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 http://www.amateurradiotraining.org ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi Ian,
Have a look at the KPA3 12V Sense Mod on the modification page. It maybe the answer to your prayers. 73 Stewart G3RXQ On Tue, 10 Nov 2009 10:49:03 +0000, Ian Maude wrote: > Hi all, > For some reason my K3 will not switch off this morning. I hit the power off > button and it powers down and starts again immediately. Obviously it goes > off when I power the PSU down but it is somewhat annoying. I have > reinstalled the firmware in case of corruption but have not as yet done a > full reset. Any ideas? > > 73 Ian ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Mod done, still the same! Odd that it should just appear after all this
time. 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC & HB9DRV-9 DX Clusters Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 http://www.amateurradiotraining.org 2009/11/10 Stewart <[hidden email]> > Hi Ian, > Have a look at the KPA3 12V Sense Mod on the modification page. > > It maybe the answer to your prayers. > > 73 > Stewart G3RXQ > > On Tue, 10 Nov 2009 10:49:03 +0000, Ian Maude wrote: > > Hi all, > > For some reason my K3 will not switch off this morning. I hit the power > off > > button and it powers down and starts again immediately. Obviously it > goes > > off when I power the PSU down but it is somewhat annoying. I have > > reinstalled the firmware in case of corruption but have not as yet done a > > full reset. Any ideas? > > > > 73 Ian > > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Ian,
It sounds like something is activating the Remote Power On. Do you have anything plugged into the ACC connector? Check it to see if pin 8 is being shorted to ground. 73, Don W3FPR Ian Maude wrote: > Mod done, still the same! Odd that it should just appear after all this > time. > > 73 Ian > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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No, nothing plugged in there.
73 Ian 2009/11/10 Don Wilhelm <[hidden email]> > Ian, > > It sounds like something is activating the Remote Power On. > Do you have anything plugged into the ACC connector? Check it to see if > pin 8 is being shorted to ground. > > 73, > Don W3FPR > > > Ian Maude wrote: > >> Mod done, still the same! Odd that it should just appear after all this >> time. >> >> 73 Ian >> >> >> > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Ian Maude
Yep as per my thread, I did it but still the same issue. I cannot imagine
that was the issue though on #455 after all this time. 73 Ian 2009/11/10 Greg - AB7R <[hidden email]> > This is the mod description from the website: > > This modification adds a diode to the KPA3 12V sense circuit to hold the > voltage to no > more than 0.6V when the K3 is turned off. Without it, some K3s refuse to > turn off when > the POWER button is tapped because the 12V sense circuit does not drop to a > low enough > level to shut down the K3’s MCU. > > The diode is a common leaded part. No work with SMDs is required. A minimum > of > disassembly is required and no boards need be removed to perform this > modification. > > > ------------------------- > 73, > Greg - AB7R > Whidbey Island WA > NA-065 > > > On Tue Nov 10 2:49 , Ian Maude <[hidden email]> sent: > > >Hi all, > >For some reason my K3 will not switch off this morning. I hit the power > off > >button and it powers down and starts again immediately. Obviously it goes > >off when I power the PSU down but it is somewhat annoying. I have > >reinstalled the firmware in case of corruption but have not as yet done a > >full reset. Any ideas? > > > >73 Ian > > > >-- > >Ian J Maude, G0VGS > >SysOp GB7MBC & HB9DRV-9 DX Clusters > >Member RSGB, GQRP 9838, FISTS 14077 | K3 #455 > >http://www.amateurradiotraining.org > >______________________________________________________________ > >Elecraft mailing list > >Home: http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/mmfaq.htm > >Post: [hidden email]','','','')">[hidden email] > > > >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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Ian Maude
I had one of my K3's develop a similar fault. In my case it was a
failure of Q2 (FDS6375, RF board) which is the power switching FET. elecraft spares sent me out one and I had it in a few days An IRF7416QPBF might be a junkbox replacement if you are very impatient! it's pretty easy to get at On Tue, 2009-11-10 at 13:05 +0000, Ian Maude wrote: > Mod done, still the same! Odd that it should just appear after all this > time. > > 73 Ian -- 73 Brendan EI6IZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Ian Maude
Ian wrote:
Date: Tue, 10 Nov 2009 15:18:00 +0000 From: Ian Maude <[hidden email]> Subject: Re: [Elecraft] K3 power down problem To: Elecraft List <[hidden email]> Message-ID: <[hidden email]> Content-Type: text/plain; charset=windows-1252 Yep as per my thread, I did it but still the same issue. I cannot imagine that was the issue though on #455 after all this time. 73 Ian 2009/11/10 Greg - AB7R <[hidden email]> > This is the mod description from the website: > > This modification adds a diode to the KPA3 12V sense circuit to hold the > voltage to no > more than 0.6V when the K3 is turned off. Without it, some K3s refuse to > turn off when > the POWER button is tapped because the 12V sense circuit does not drop to a > low enough > level to shut down the K3???s MCU. > > The diode is a common leaded part. No work with SMDs is required. A minimum > of > disassembly is required and no boards need be removed to perform this > modification. > You're not alone Ian - we have two K3s #320 and #321 in a Multi-Single or Multi-Two arrangement for CW contesting. #321 developed the power down problem so I did the mod. No effect at all. #320 has never had the problem, even though they run off the same 12v power supply. Not a show-stopper - I just disconnect #321 until contest time.<G> 73, Ken ZL1AIH (ZM1A in contests) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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