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Old 10-31-2021, 10:26 PM   #12
Solder Sloth
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Join Date: Nov 2012
City & State: CO
My Country: USA
Line Voltage: 120VAC 60Hz
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Posts: 7,193
Default Re: Motor control board

photo of the tracks on the back side of the board? does not seem right that two apparently "GND" ports are not grounded/tied together - unless the company was playing tricks with virtual grounds and using the same BOM device for both rails... Or the silkscreen is wrong and the chips on the heatsink are different, still don't know what they are...
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