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K2 Alignment and Testing Part 1 Troubles

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Curt

K2 Alignment and Testing Part 1 Troubles

I know this list is mainly for K3 owners. Still notice few postings for K2,
so am hoping for some help.

I am having a rather vexing time with Alignment & Testing Phase 1. My
problem is that all of the front-panel controls and display work as they
should EXCEPT for the Menu/Edit button. The button press is making it to
U2, can see the voltage change on pin 6. All the chip voltage checks seem
normal. I have performed the master reset operation, it proceeds as
expected but doesn't fix the problem. One additional behavior noted is that
if the K2 rests overnight without power connected, then the Menu button is
pushed immediately after power-up and initialization is completed ( 7.100 c
on display ), the st L 40 appears. Usually this will only work once or
twice, thereafter it stops working. Elecraft is sending a new MCU, but
somehow I suspect this isn't the problem because everything else seems to be
working so well.

Has anyone else experienced this problem, or does anyone have advice about
how to determine the root cause of the problem ?

73, Curt KB5JO

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Ken Wagner K3IU

Re: K2 Alignment and Testing Part 1 Troubles

G'morning Curt:

Sorry I can't help you with your specific problem, but PLEASE don't
think that this list is "mainly for K3 owners." It may look like it at
times, but this list was here long before the K3 was even announced and
is open to any and all issues related to any Elecraft product. It is
certainly appropriate to pose your K2 related query here.

Hope that the new MCU fixes your problem.

73,
Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Curt wrote:

> I know this list is mainly for K3 owners. Still notice few postings
> for K2, so am hoping for some help.
>
> I am having a rather vexing time with Alignment & Testing Phase 1. My
> problem is that all of the front-panel controls and display work as
> they should EXCEPT for the Menu/Edit button. The button press is
> making it to U2, can see the voltage change on pin 6. All the chip
> voltage checks seem normal. I have performed the master reset
> operation, it proceeds as expected but doesn't fix the problem. One
> additional behavior noted is that if the K2 rests overnight without
> power connected, then the Menu button is pushed immediately after
> power-up and initialization is completed ( 7.100 c on display ), the
> st L 40 appears. Usually this will only work once or twice,
> thereafter it stops working. Elecraft is sending a new MCU, but
> somehow I suspect this isn't the problem because everything else seems
> to be working so well.
>
> Has anyone else experienced this problem, or does anyone have advice
> about how to determine the root cause of the problem ?
>
> 73, Curt KB5JO
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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Don Wilhelm-4

Re: K2 Alignment and Testing Part 1 Troubles

In reply to this post by Curt

Curt,

This list is for *Elecraft* owners, and those interested in any Elecraft
gear. That includes the KX1, K1, K2, transverters, KRC2, the
mini-modules and yes, the K3. Discussion about the K3 has filled the
reflector contents of late, but there are others asking about the other
products.

Have you considered that you might have a bad pushbutton? Since you say
all the other buttons work, that just might be the case. I would
specifically ask if the XIT button works. How about the BAND+ and BAND-
buttons? The MENU and XIT buttons share the same line to Front Panel U2
(pin 6) and RP1 pin 3 must be well soldered.

In addition, consider that the MENU pushbutton may have a bad solder
connection - the legs do not stick very far through the board. Try
soldering the pushbutton from the top of the board.

The fact that you can sometimes get it to work points to a bad solder
connection rather than a firmware chip problem. Check the soldering at
the points I mentioned above.

73,
Don W3FPR

Curt wrote: