MC-40 controller troubleshoot

Thread Starter

Joined Jan 25, 2012
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


Joined Nov 25, 2009
Greetings! And welcome to AAC!

Your post, originally found here ( has been moved into its own thread, where it will draw more responses. Notice that the thread you posted onto, was quite old.

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