Hello , I have a problem with my analog oscilloscope . I want to replace the burnt capacitor of my oscilloscope, but the problem is that this capacitor is not available in a local store. writes up 0.1uf X 2x4000pf Y
.and I thought to replace with 3 capacitors. 2 are 4700pf and one is 100nf .. the problem is how exactly will I connect them? I researched the topic a bit and thought of this way in the photo with the design. if anyone knows i would appreciate it, i am also attaching the capacitor that is burned .
.and I thought to replace with 3 capacitors. 2 are 4700pf and one is 100nf .. the problem is how exactly will I connect them? I researched the topic a bit and thought of this way in the photo with the design. if anyone knows i would appreciate it, i am also attaching the capacitor that is burned .
Attachments
that strange cap is a "delta" cap, a combination of a X-cap (100nF) and two Y-caps (4700pF).
the X cap is connected on AC-AC (230Vac),
the Y caps to AC - earthground (greenyellow cable).
take care.
the X cap is connected on AC-AC (230Vac),
the Y caps to AC - earthground (greenyellow cable).
take care.
Yup, that's the one. Make sure you use appropriate X and Y caps as in the original.
thank you very much ! 🙂 the only I change is the 2x 4000 pf , I put 4700pf because there are no 4000pf . And all 3 caps are 270 vac tolerance .
Plain 270VAC capacitors are not safe here. They must be X rated and Y rated, respectively, explicitely indicated on them.
It is not related. The X and Y rating means the never go in short circuit during a failure, which could be dangerous.