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04.28.2007, 09:01 AM
IMO, that smoke residue isn't from that cap unless the end of it is blown off or it's cracked in the middle. Zero is right though, it looks like a little ceramic cap to me, probably an 0805 physical size and likely something around 1uF. Anything larger than 1uF in a ~35V or higher rating is probably going to be in a larger physical size package than what's there. However, I've debugged quite a few circuits in the past and very very rarely have I ever seen a failed ceramic cap...maybe once out of a hundred or more circuit cards?
I think the biggest problem here is that the ESC was modified by the user and there is a snowball's chance in hell of S&T covering it under warranty. Taking a stab at what's wrong with the ESC by looking at some residue on the casing isn't going to do that. My suggestion is to at least send it to Mike or someone else with experience repairing ESC's or troubleshooting electronics to at least have a chance it might work again. I don't mean to sound harsh about it, but online troubleshooting of this ESC by pictures ain't gonna work. Case in point, we had a video deserializer card at work this past summer that someone killed when the voltage knob on the PS got bumped and overvoltaged the card. The only component physically damaged was a little voltage regulator, which we replaced. However, even after replacing that regulator, there was still a short circuit on the 3.3V bus on the CCA and absolutely no other physically damaged components on the board. The main point is, a component doesn't always have to be physically damaged in order to have an internal problem.
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