Don: Yes D5 was backwards. I was not able to save the diode during removal, mainly because it was too near the knobs and switches and I have already melted and replaced one of each. I ended up cutting the diode leads on top and just desoldering the leads from the bottom. I ordered a replacement diode but I was hoping that the same diode was used elsewhere on the K2 or accessories and I could 'borrow' one until the replacement came. No such luck as it is not used anywhere else on the K2. I will just have to wait unitl the part arrives but I feel pretty confident that D5 was the cause of my troubles. Thanks again!
Brian http://home.comcast.net/~b.denley/index.html ----- Original Message ----- From: "Don Wilhelm" <[email protected]> To: "Brian Denley" <[email protected]> Cc: <[email protected]>; "Elecraft Reflector" <[email protected]> Sent: Sunday, June 27, 2010 4:07 PM Subject: Re: [Elecraft] K2 Initial Tests > Brian, > > In the back of the manual, you will find a parts placement diagram that > clearly shows the orientation of the diodes. Use that for reference > rather than a photo - it is easier. > > Yes, D5 installed backwards could cause the buttons to not function, and > may also create other "funny happenings". > > 73, > Don W3FPR > > Brian Denley wrote: >> Don: >> After poking around, I am leading toward D5 of the Front Panel board >> installed backwards. From the schematic, this would prevent bank 1 of >> the switches and the power knob from functioning properly and would, I >> think, also affect the keyer operation. I have looked for a photo of >> this board on the Elecraft site but the one they have is the 1999 board. >> If that circuit hasn't changed then D5 is indeed backwards. I can't see >> the silkscreen patterm on my board anymore as the diode covers it too >> well and it is too stiff to move. From the schematic, however, I am sure >> it's backwards. >> Thanks again for your help! >> Brian >> http://home.comcast.net/~b.denley/index.html >> >> >> ----- Original Message ----- >> From: "Don Wilhelm" <[email protected]> >> To: "Brian Denley" <[email protected]> >> Sent: Sunday, June 27, 2010 10:48 AM >> Subject: Re: [Elecraft] K2 Initial Tests >> >> >> >>> Brian, >>> >>> You didn't say anything about the buttons not working before. First >>> step is to re-flow the soldering on the entire front panel. >>> >>> 73, >>> Don W3FPR >>> >>> Brian Denley wrote: >>> >>>> Don: >>>> Thanks and I will resolder those connections but it bothers me that >>>> none of the buttons respond at all. Only the encoder seems to work >>>> properly. >>>> Brian Denley >>>> http://home.comcast.net/~b.denley/index.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 >> >> ______________________________________________________________ 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
