Rewinding burnt choke coil

[stj]

Re: Rewinding burnt choke coil

looks familiar.
those are 10-20$ from places like banggood.

i like switching psu's with "cage" cases rather than sealed with a fan - that's why!!!

[Dannyx]

Good day folks. Someone recently gave me a dead power supply they pulled from a CCTV system and told me I could have it since they already replaced it with a new one, so I took this one apart and the inside was really in a shocking state: there's burnt traces, blown capacitors, a jammed fan and worst of all this: fried coil.....awesome. I think what happened to this guy is the fan failed and the heat quickly became too great for some of the components to bare, so they failed, especially since the numbnuts may have put a significant load on it. It's a PNI and it claims 10A continuous which although may not sound too shabby, I doubt can be achieved - not with the state of that output...

The biggest issue here is rewinding that coil, since I suspect the enamel has come off the windings due to the heat, which is not good since the windings will short out. Can I take some 0.3mm enamel copper wire and just rewind the thing ? (yes, I measured it with calipers). It's not too tightly packed and if I carefully remove the existing wire and measure its length it seems like an easy job. Worst case scenario is that one of the rings is just going to crumble somewhere in the middle of me trying to remove it and if that happens, I'm not sure how easy it is to obtain a ring of the same diameter and thickness....what do you guys think ? It's not so much about the PSU since I'm sure it's a piece of junk at the end of the day, but about honing my skills and enjoying a good project