Today I received a preheat bed AOYUE-AO853A. I was really eager to plug it in an test it, ignoring the voltage input rating. It worked for a second making a strange noise, but then some smoke started coming out.
I have two questions:
Is there any chance that the components beyond the transformer have fried? From a visual inspection, everything looked ok on the single PCB this device has.
What transformer should I use to replace this one to be able to power the device with standard European 220V?
Update: I noticed that the board is not only hooked to DC (from the transformer), but also to AC.
- 1 is the heating element
- 2 is the AC in
- 3 is the DC in
Note that the capacitor at the right of the DC in is rated at 25V and all the other capacitors are rated 16V
As required by a top user, I posted a picture of the wiring for the heating element. It seems it's wired in series already.