Since you have a KBMM-225D, maybe you could help me out. I also have a KBMM-225D, but mine was modified by a company to be used in their film transfer equipment (can't remember the company name) by removing almost all the trim pots and adding a second PCB. I've removed the second PCB, but I need to find the values for the various trim pots. Are you able to find that out from your controller? Could you also check to see if there is a diode mounted in position D9B, and if so, what's the name of it?
Thanks,
Stig