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Re: KIO2 troubleshooting

Posted by Jason Marten on Jun 25, 2005; 5:02pm
URL: http://elecraft.85.s1.nabble.com/KIO2-troubleshooting-tp379756p379762.html

I don't think it's a problem with the jack screws, as they back out
completely into the housing, and I can plug in the cable all the way to my
computer and KIO2 board.

My biggest concern is that P4-7 on the control board is putting out 0 V.  
>From the troubleshooting section of the KIO2 manual, it says that J2-7 (and
also P1 and J1, because they are connected in parallel except for pin 8)
should have 4.5 V, and J2-7 mates with P4-7 on the control board.

If I do hook up the KIO2 to my serial port with the computer on, J2-7 drops
down to -4 V or so.  The manual says to unplug it from the computer when you
do the reading, however.

Any ideas?  The only thing I did on the control board besides clipping the
leads on P5 was tighten U4 because the bolt was a little loose.


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