I have a busted 12V transformer: the 220V input coil has no resistance, hence no 12V output. I felt unhappy about throwing it away, so decided to learn something by taking it apart, and possibly repairing it along the way.

The label said it was protected against overheating (125° C), so I suspected the heat-fuse was blown. After a lot of unwrapping and unwinding the 12V coil (booooring), I ended up where the fuse was placed. It was indeed blown, but the coil was still ok, so I ordered a reset-able one. The reconstruction will be part 2 🙂

Torodial transformer

Torodial transformer, 12V coil removed.