Hi Folks,

 

We had one of our many K3s at M6T fail over the weekend of the WPX SSB
contest. It was quietly minding its own business as 2nd radio on 80m (not
getting any use!) and at some point it started displaying the E000202 error
along with DSE - then as you cycle through DS1, DS4 and DVR. So - it seems
that we've lost communication with both DSPs and the DVK. All those are
mounted together of course.

 

I've tried re-loading the firmware - but the utility fails to upload to
DSP1, DSP2 and DVK and can't see any version installed on any of these
options. The radio is an old serial number (#729) - but it had had many mods
done to it - including the gold finish connectors. There is no sign that the
failure is intermittent - plugging and unplugging make no difference and
I've done a bunch of connector cleaning. The rest of the radio appears to be
operating - push buttons and bands change etc. - but a bit slowly - as if
the comms bus or CPU is busy. 

 

Through board swapping with another K3, I've isolated the problem to the
main DSP board. I've checked the +8, +5, +3.3 and +1.8V rails on the board
and these seem OK, but I haven't got the scope out yet. Just checking to see
if anyone else has suffered this same sort of mix of faults and found the
source.

 

73

 

Andy, G4PIQ

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