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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