Hi all, I tried to convert this power supply from 12 to 24v.
I identified the tl431 and associated voltage divider. Strangely the resistor values didn't match their measured resistance, but I went with the measured values and added a resistor R2 to bring the REG input to the tl431 down by 1/2
Thinking everything was good, plugged it in and got sparks an fire! Woohoo!
The problem is it looks like 2 caps are basically gone now (blown away), something that looks like a transistor and something else I don't recognize. Here are the photos:
Missing cap 1:
Missing cap 2:
Blown transistor-looking thing:
No idea what this is:
More photos of the whole device here:
https://goo.gl/photos/xoWdZnFKWV6Agw2h8So my question is, can this be fixed? Is it worth it? I already removed the resistor I added, and my plan is to give it another try if I can get the power supply running at 12v again first.