[Elecraft] K2 Initial Tests

[Don Wilhelm]

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" <don at w3fpr.com>
> To: "Brian Denley" <b.denley at comcast.net>
> 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
>>>       
>
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