[Elecraft] KRC2 trouble shooting

[Don Wilhelm]

Kazu,

Try re-doing the tests on page 15 of the KRC2 manual.  If those tests 
are not successful, try loading the KRC2 firmware (download available 
from the Elecraft website).  You would need the KRC2 Download Program 
loaded onto your PC and the actual firmware file to be loaded from the 
PC - KRC2 Firmware 1.5.

If the firmware load fails, then you need to look for the problem in the 
KRC2.  The usual advice of "Check soldering, then re-check the 
soldering, and when that is finished, check the soldering" applies.  It 
may be that the firmware chip itself has failed, but hold on that 
conclusion until you have tried the soldering check and attempted 
another frimware download.

If all of the above fails, then you may have damaged outputs on the 
firmware chip itself and you will have to order a new chip.

73,
Don W3FPR

Kazunori Watanabe wrote:
> Hello, 
>
> I just completed KRC2, initial test in page 15 of manual was successful. 
> Now completed final assembly and connect to K3 using AuxBus, turn 
> on 12V, LED does not turn on, K3 does not recognise KRC2. 
> Later I realised I should connect GND on pin 5 of K3 side, instead of 
> pin 6, which "KCR2" Manual Errata Rev C-2 Feb 11, 2009 instructed 
> me to do so. 
> Is there any possibility I damaged KRC2 because of this error? 
> After disconnect all cable and put 12V, still no LED light and no output. 
>
> 73 de Kazu  JK3GAD/M0CFW
>