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Old 10-31-2021, 03:16 PM   #4
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Join Date: Jun 2012
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Default Re: Motor control board

What are the numbers on the regulator ic's? especially the negative one. Doe the transformer only have 2 wires supplying the board or is it center taped?
There are two voltage regulators with large heat sinks on the board. One gets warm, and the other is room temp
you might want to indicate which one gets warm, is it the positive one or the negative one?
If you don't have a balanced circuit +15 and -15, you could see some positive voltage on the negative supply.

Last edited by R_J; 10-31-2021 at 03:21 PM..
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