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Old 11-12-2021, 12:33 AM   #20
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eccerr0r's Avatar
Join Date: Nov 2012
City & State: CO
My Country: USA
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Default Re: Motor control board repair

Black square thing with four pins on the corners, a hole in the center, and a notch cut from one corner is a bridge rectifier. Can't see the designator, need more pictures from different angles so we can tell what you're talking about.

Have to say it's highly irregular to have AVR1 and AVR2 in parallel, then again they being identical parts? What are the part numbers? Why does AVR1 look like it peeled from the heatsink?

-- avr1 and avr2 are not parallel as the G pins are not connected, so one of them is being used strangely for bipolar supplies?

Still a mystery what part numbers they are and how they're connected to the rest of the board...

Last edited by eccerr0r; 11-12-2021 at 12:36 AM..
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