Thanks, Don. Shorting those two pads together with a screwdriver brought the speaker back to life, confirming the "standard" failure. Now I can decide what to do about it! 73,Steve VE3SMA From: Don Wilhelm <d...@w3fpr.com> To: Steve Kavanagh <skavanag...@yahoo.ca>; "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> Sent: Friday, June 26, 2015 10:25 PM Subject: Re: [Elecraft] K2 headphone jack pinout ? Steve, with the front panel facing you and the K2 "on its back".
73, Don W3FPR On 6/26/2015 9:23 PM, Steve Kavanagh wrote: > Thanks for the quick reply, Don! When you say "the solder pad to the right " > do you mean with the front panel facing me, or with the front panel away from > me? I was thinking I might try something like that - maybe adding a speaker > switch. 73,Steve VE3SMA > From: Don Wilhelm <w3...@embarqmail.com> > To: Steve Kavanagh <skavanag...@yahoo.ca>; "elecraft@mailman.qth.net" ><elecraft@mailman.qth.net> > Sent: Friday, June 26, 2015 7:57 PM > Subject: Re: [Elecraft] K2 headphone jack pinout ? > > Steve, > > An examination of the headphone jack connections in the K3 schematic > should answer your question. The switch that activates/deactivates the > speaker is completely isolated from the contacts that provide headphone > audio through resistors R35 and R36. > There is a plastic lever inside the headphone jack which activates that > switch - and the operating lever for that switch does break occasionally. > Efforts by Elecraft to encourage the jack manufacturer to beef up that > operating lever have met with failure. > > If you wish to effect a temporary fix, open the bottom panel of the K2 > and look at the rearmost 3 solder pads on the headphone jack. Solder a > wire from the center pad to the solder pad to the right (looking at the > bottom of the board. That will make the speaker active at all times. > If you want to silence the speaker, plug a bare 3.5mm plug into the > External Speaker jack on the rear panel. > > For full instructions on how to replace the headphone jack on your K2, > look at my instructions to WY3A at > http://www.qsl.net/wy3a/Replace_K2_Headphone_Jack.htm. Thanks to Bill > for posting those instructions. > > 73, > Don W3FPR > > > > > On 6/26/2015 7:19 PM, Steve Kavanagh wrote: >> I think one of my K2s has suffered the dreaded headphone jack failure (no >> speaker or speaker jack output - headphones work fine). To confirm this >> diagnosis (and perhaps to make mods to prevent it happening again) I'd like >> to get my hands on the pinout of the headphone jack J2. I was surprised I >> couldn't find a link when searching through the list archives. Has anyone >> got this info? Which pins are the speaker switch? 73,Steve VE3SMA >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to w3...@embarqmail.com > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w3...@embarqmail.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
