SMPS blast


Joined Jun 4, 2013
Well, Rritesh, off hand it seems clear that the circuit developed a short somewhere. The fuse blew, which kept the good part of the circuit still intact. When you shorted the fuse, all the protection was removed, and some parts overheated and blew up or burned up. I did that once in a TV and it caught fire. Flames going up three feet. Lots of fun, but not helpful as a diagnostic technique.
Maybe the 8 pin IC developed an internal fault and started to draw too much power but the fuse blew. Maybe another component, like a transistor, failed and pulled too much power through the 8 pin IC.
I'd say the board is toast (that's the technical term <grin>). To fix it now is a lot of work. Do you still want to try?


Joined Jun 22, 2012