Hi Johannes,
Thank you for the suggestion...
I checked the voltage on pin 1 of IC7 on the KLM-367 and it reacts as expected! About -5V CCW, 0 at indent, about +5 CW, I tried re-seating the CN05 cable on both ends, but that didn't work. I've checked that the signal is making it to pin 10 on the CN05 connector on the KLM-367 side and it is there as expected.
Any suggestions where I should look on the KLM-366?
Thanks so much!
Rob