Long story short, I have a friend that got a broken Krell Amp, Evolution 403e, and is pretty much immediately going into protection mode. When using my thermal camera, it looks like a ton of mosfets (they looks like mosfets, I haven't pulled the thing apart enough to triple check) get up to 200f pretty darn quick, about 15 seconds or so.
I believe I narrowed the issue down to the capacitor board. It's essentially just an entire PCB filled with 100v 4700uf caps, 36 of them in total.
Time for the idiot check... I was under the impression if you test a cap with a multimeter, and it says it's shorted, it's garbage... When I test the caps (while in circuit and both correct polarity and reverse) they all show shorted, but I feel like when I do that for long enough, they eventually stop showing shorted.....
So I guess the question is, if I get enough charge into some of these, is it then reading correctly, or what? There is no way I'm charging these all the way up with a normal DMM and 10 mins of testing.
And yes, I'm aware that I have to remove them from the board to test accurately and yes, in circuit the short could be coming from anywhere, but I just unsoldered one of the caps and man...it sucked, I'm not looking forward to 3 hours of desoldering....