Jerry,
Yes I see the photo.
Although it looks like the copper is intact, I would scrape away a bit
of the silkscreen on each end of the damaged area and then solder a
small gauge wire across the damage. If you have some #24 wire (from
ethernet cable for instance) use that rather then the #22 wire supplied
with the K2 kit.
It is usually best to route the wire along the original PC board trace
so you can tack it in place at several places along the way from end to end.
Reflow the solder on the encoder board just in case that is the problem.
73,
Don W3FPR
On 10/22/2022 9:33 PM, Gerald Wolczanski wrote:
Don, indeed it was the FP encoder board touching the back of the
control board. I'm attaching a photo, which I guess only Don can see.
The PCB traces are dinged up, exactly .3" apart. Two things:
1) Wonder if the control board or the encoder board may have been been
damaged by these boards touching? Occasionally, in these last few
days, the encoder freezes up and a tap on the menu switch gets it back
to normal. Even after I trimmed the encoder board leads and put a
piece of think plastic material between the control board and the
encoder board, I still get the occasional encoder freeze-up.
2) Can I try and flow some solder on those damaged traces?
Thanks so much for your help!
Jerry
KI4IO
Warrenton, VA
On Sat, 2022-10-15 at 17:36 -0400, Don Wilhelm wrote:
Jerry,
That does sound like it might be a bad solder connection.
Try resoldering Front Panel RP1 and U2. Those components are
critical
to decoding the switch matrix.
You might also try reseating Control Board U6 - but do so in a static
controlled manner.
With that 7xxx serial number, you might instead have a problem with
the
FP Encoder board contacting the back of the Control Board which
causes
"strange things" to happen.
Flush cut all leads on the encoder board (right through the solder
fillet) and also on the Control Board where the encoder board could
contact.
As an extra measure, put an insulator (fish paper is best, but a
piece
of card stock or better yet, a piece of flat plastic (like from many
forms of plastic packaging) between the encoder and the control
board.
73,
Don W3FPR
On 10/12/2022 5:51 PM, Gerald Wolczanski wrote:
from KI4io - Jerry Wolczanski
My K2 started exhibiting this problem in June and it's gotten
worse.
The LCD toggles rapidly between the frequency and the last menu
used.
A tap on the menu switch restores the display to normal. It was
quite
infrequent to start, but now it's bothersome, happening every 10 -
15
minutes.
I re-flowed the switch contacts on the front-panel board this
morning,
but the problem persists.
Is this a switch issue or something else?
K2 S/N 7xxx
KI4IO
Jerry Wolczanski
Warrenton, VA
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