[Elecraft] Resistance Checks During Front Panel Assembly

[Michael Cook]

Hi all. I just got my K2 in the mail this morning (hooray!) and I've  
been busily assembling. I did the control board and all checked out  
there. Now I've soldered most all of the front panel and I got to the  
resistance checks and ran into a problem.

Now when doing the resistance checks so far, when the manual says a  
range, things have been in that range. When the manual says ">50k" or  
">1M", things have been fine. My meter reads something (usually about  
4-6M). So I went through the resistance tests three times but I'm  
running into problems.

The first 40 test points (the pins on the LCD driver IC, U1) worked  
fine. Everything was as expected.

Then I got to the 20 tests on J1. The first 7 pins of J1 (measured at  
the solder point) are all "OL" which is my meters way of telling me  
that the probes aren't connected. In other words, infinite resistance.

Most of the rest of J1 works. Pin 8 measures zero, pin 10 measures  
4.4M (should be >50k), pin 12 and 14 both work (6.6M), and everything  
15 and above checks out too.

Pins 1-7, 9, and 11 all register as unconnected. I've even tried  
measuring from other pads that are connected by traces (for example,  
some of those connect to where the shaft encoder will go) but they  
still register unconnected.

Everything looks soldered well, I see no bridges, etc. I've build  
tons of kits, I'm quite confident in my skills. I just need to know  
what to check.

-- Michael Cook