- Joined
- Jan 21, 2010
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- 25,509
That last image looks almost exactl like what you'd get if a regulator was falling out of regulation (you say it's unregulated though).
You get a fixed voltage until it falls -- and the dropoff looks almost exactly like a discharging capacitor. Then the charging side looks exactly like the leading edge of a sine wave.
Go back a little more and see if there is a bridge rectifier. If there is, check it. This looks a bit like your full wave rectification has gone half wave.
You get a fixed voltage until it falls -- and the dropoff looks almost exactly like a discharging capacitor. Then the charging side looks exactly like the leading edge of a sine wave.
Go back a little more and see if there is a bridge rectifier. If there is, check it. This looks a bit like your full wave rectification has gone half wave.