[Elecraft] Need help with test stage one power up problems on K2

[W3FPR - Don Wilhelm]

Jess,

In general, if it worked once, the firmware is likley not to blame.  Check
the soldering on the front panel carefully - especially pin 1 of U1 - you
can solder it from the socket side if you cut away a bit of the plastic.
The normal reuslt of an unsoldered connection is that it works sometimes -
if you flex the board and things change, you can be certain that an
unsoldered or poorly soldered connection is to blame.  Secondarily, the
board to borad connections can cause similar behavior.  Check everything
carefully, then check again, and when you are finished, check the
soldering - have someone else check it if possible, another pair of eyes can
often spot what yours may overlook.

73,
Don W3FPR

> -----Original Message-----
>
> So far I thought I was doing great. Just to save some time I
> thought I would
> ask the collective before I go digging for misplaced components and solder
> bridges.
>
> I am building a K2 for a friend. I am at the first point of power up
> testing. Control board, front panel and a few components on the
> RF board. I
> got the INFO 201 for about 10 seconds, then the display flashed
> Elecraft and
> then 7100.00 as it should. Now the problem. No front panel
> function. At all.
> No buttons work and the frequency will not change via the
> encoder. Also one
> in 5 power ups the LED display will light all segments and the
> backlight on
> the display will come on, but that is all. I have done a good
> visual and see
> no components unsoldered or shorts. I am extremely careful when
> building and
> usually don't have any problems when building. Maybe it is just
> my turn. Any
> and all suggestions would be appreciated. I am thinking firmware perhaps.
>
> Jess AE0CW <><
>
>
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