techknight
Well-known member
Judging by the wavy picture, I would say your main input filter is wasted. Or at least some of the output capacitor filters.
Flubbing/pulsing is caused by not going into proper regulation. Need to check the opto-isolator or whatever other parts might be in the feedback loop, As well as checking the over-current sense circuit. Both will cause this.
The way to determine which is to scope the output to the sweep circuits. If you see a nice ramp with severe overshoot before the "shutdown pulse" then its going out of regulation. If you see a swoopy line before shutdown, you have an overcurrent problem.
Flubbing/pulsing is caused by not going into proper regulation. Need to check the opto-isolator or whatever other parts might be in the feedback loop, As well as checking the over-current sense circuit. Both will cause this.
The way to determine which is to scope the output to the sweep circuits. If you see a nice ramp with severe overshoot before the "shutdown pulse" then its going out of regulation. If you see a swoopy line before shutdown, you have an overcurrent problem.
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