At 22:10:02 EDT on Thu 1 May 2008 Scott McDowell (N5SM) wrote ...
Has anyone besides me had any trouble with the microprocessors in the
K2's put out lately by Elecraft.
:
:
Where do I go from here?
--
Hi Scott,
The first thing I would do is to inspect the MCU that you removed for
any bent under pins. If you find any then that's probably what was wrong
with your first MCU.
If you don't, then I would remove the new MCU and perform the same
check. If you don't find any bent under pins on that one either, then
chances are that there's something amiss in the associated circuitry in your
K2.
It would also be useful to know if the original (old) MCU now performs
like the new one does, so next I would reinstall the original MCU. If the
original MCU now functions like the newer one, then this would indicate that
something in your K2 was disturbed in the process of exchanging MCUs.
BTW, you didn't mention but I assume you are referring to the main MCU
on the Control board. On fairly slim possibility that comes to mind is that
when I was installing CTRL-C21 while building my K2, it actually broke
because the leads weren't formed to the spacing of its mounting holes. So
you might look for damaged components in the vicinity of the MCU.
73,
Gary KI4GGX
K2 #4067
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