[Elecraft] KRC-2 Possible Lightning Failure

[Don Wilhelm]

Brian,

The best way to attack a KRC2 that has been subjected to a strong 
lightning surge is to replace all the ICs (and possibly other active 
devices).  If you have a good desoldering tool it is not a difficult 
task to remove the ICs.  Lacking that, assume the ICs are bad and clip 
the leads from the IC bodies and remove the pins one at a time.

Wholesale replacement takes less time than trying to troubleshoot what 
could be multiple failure, and is not really that expensive.

73,
Don W3FPR

On 6/20/2014 1:19 PM, Brian F. Wruble wrote:
> Hi all:
>
> I have had my K-Line (K3, KPA500, KAT500, P3) all working brilliantly, both
> local and remote using my new K3/0 Mini.
>
> While I was away, a severe electrical storm passed through the QTH in
> Maryland.  I returned, moved cables around to get local operations geared
> up.  The KRC-2 band decoder seems to have failed.
>
> I have 5 volts after the voltage regulator, U3, but I cannot get 12V at any
> of the "high side" driver outputs on J6, J7, J8 and J9.
>
> The unit communicates with the configuration program, and I have firmware
> version 1.6.  I have re-loaded the firmware.
>
> What should I try next?
>
> Tnx es 73 de Brian W3BW
>
> *Brian F. Wruble, C.F.A.
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