Hi folks,
so this is my first post after reading a lot in this forum
First I have to thank all the people around here for helping and discussing about very intersting topics. I learned a lot!
So this is my problem now:
I got this power supply
http://www.amazon.de/Wentronic-Stabilisiertes-Labornetzger%C3%A4t-Ampere-Display/dp/B001C6FQF0/ref=sr_1_1?ie=UTF8&qid=1452881325&sr=8-1&keywords=Wentronic+Stabilisiertes+Labornetzger%C3%A4tI bought it in 2012 and it worked like a charm until a few weeks. Now it produces an overshoot everytime I disable the output with the right red output button.
E.g.:
Settings: 3,3V with current limit 0,25A
Load: 100R or without load, doesn't matter.
I got some screenshots in the attachments.
I also tried to reverse engineer the output stage, but I think that the problem is actually in the control loop after looking at the schematic.
It is very troublesome...
Does anybody has the real schematic of this power supply or even own the same supply and has got the same problems?
Do you guys have some ideas at what I should look for? I also checked the electrolytic capacitors and added some in parallel but it didn't help, too.
Thank you very much in advance for your help!
Regards