[Elecraft] KRC2 trouble shooting
Kazunori Watanabe
jk3gad at mac.com
Wed Mar 17 09:13:18 EDT 2010
Thanks for everyone for suggestion.
Here is some update.
1) Power polarity is right. :-)
2) LED is still off and no output, so page 15 test failed this time.
3) Checked soldering. Seems ok.
4) Try to connect to PC through firmware download software and configuration utility.
However software cannot recognise. Well, so no LED means KRC2 is dead.....
5) Checking voltage of U1. Not a surprise Pin 9 and 10 are 0v as these are source of voltage of LED.
Compare to page 28 chart, most of pin's voltage are ok EXCEPT,
P3 0
P6 0
P8-10 0
P17 0
P27 0
P29 0
Wish I can fix it before RDXC!
73 de Kazu JK3GAD/M0CFW
> 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
>
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