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Old 11-12-2021, 07:45 PM   #22
Join Date: Feb 2010
City & State: Ames Iowa USA
Line Voltage: 120VAC 60Hz
Posts: 69
Default Re: Motor control board repair

Originally Posted by R_J View Post
Are you getting a/c voltage to SR3? It is likely a bridge rectifier, why it is labeled SR3, who knows.
If you are not getting any a/c to the bridge, check the resistance of the traces and the power supply winding that supplies that circuit.
What is the part number on SR3?
Is it going to be safe to power up the board with 120VAC? That's about 10% higher than the 107V at the machine. I assume any voltage regulators should be able to handle that but just wanted to check first since I've not dealt with something that is expecting 107V.
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