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Here's a better image of the one which came through as an attachment:

Not sure why one of them posted as an attachment...oh well. In regards to continuity, open-circuit between the stub of disintegrated leg and the intact one.

Peter, Here are the two sides of the ceramic capacitor? in question. Only one leg needed de-soldering as the other vaporized (thus the sad appearance)... I haven't removed the silicon which held it to the electrolytic cap, but instead photographed her sister (after peeling her away from...

Peter, should I be checking the alternator first before going any further with the inverter? Could the problem have originated there? Certainly just prior to the smoke pouring out I heard something which could best be described as some sort of mechanical rubbing sound. Thx, Marcel

Ugh...not going to give up just yet, but the thought of tossing it into Lake Norman as point-of-interest for young carp seems quite appealing right now ;).

Separated power board from heatsink... Clear evidence of source of smoke (roasted disc capacitor - other side shown for reference)... Pretty clear which transistors have been damaged also (look bottom-right)...

kloppk, that was very helpful - thanks! I've managed to break it down to individual boards, with the exception of the board holding all the electrolytic caps. The board holding the electrolytic caps also holds the output transistors, which are attached to the heatsink by socket-head cap...

This project got shelved for a couple of weeks due to travel... ...my replacement electrolytic caps have now arrived, so I was looking to strip the inverter down to clean, inspect, and swap-out caps. Anyone know how to best disassemble the unit? Seems a bit of a Chinese puzzle...parts of...

Arrow.com had them in stock. Peter, with the power semi's...is there a way to diagnose them in-circuit, or will that be an ugly desolder/removal/test/replace operation?

I ordered a dozen NICHICON LGN2G561MELC40...same spec, but improved temperature rating (105 C). Thx!

peapvp, so I take it that upping the capacitance from 560uF to 860uF is not an issue? In most audio (mainly tube) amplifier rebuilds I've performed, more is always better in the power supply, but that is not the case in the signal-path circuitry. Thanks!

Peapvp, thanks for that info. I didn't realize those were inductor coils and not transformers...perhaps good news since they shouldn't be as expensive to replace (so long as available). What downstream damage might I expect? I am not impressed with the supplier, TRC, who brag on their website...

I managed to do a bit more breaking-down tonight, and it doesn't appear the cheap-o Panasonic ED's are the culprits as none of the tops have bulged, let alone - burst. Here are some pics... It would appear the smoke originated from the large toroidal transformer and perhaps also the smaller...

Dav5, you are absolutely correct - I have no idea how I got myself turned around like that. Thanks! I've updated both the title and the thread to reflect reality.

Hi all - newb here with my first post. I recently acquired a Fermont MEP-831a from a GovPlanet auction. The unit, with just under 1300 hours, was known to not start, and had numerous fuel leaks. It was also listed as missing some engine parts, although from the auction images the Yanmar...