Re: A question about PWM IC's
Hold on don't give up. If one measures with a volt meter in the DC volt setting from the ground of the primary to the output of the rectifier what does that read? You said you read 165 DC. Is that measured from earth ground? If the Ground of the primary is risen or lowered by some means it will blow the circuit when the ground of the scope is attached because it shorts the voltage to ground. It might also explain why there is 165 VDC on the output of the rectifier. If one is looking from earth ground to bridge rectifier output it will seem to be more because of the rectifier ground going up. So in this case one can simply measure from the two grounds with a volt meter and see if there is a voltage difference.
Originally posted by R_J
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