To Trolly1; Thanks for your schematic for the MC-60. I been trying to troubleshoot a MC-40 controller that I plan to use on an industrial sewing machine. I'm okay with the SCR's, the opto coupler, the transistor, and the discrete components, but the DIP's ( one 14-pin and one 8-pin)are a mystery. They are labeled AN1324 and AN1358. My next attempt will be to hook controller, motor, and choke altogether and start probing with the oscilloscope, that is if I can a common ground.
Thanks Again
Thanks Again