On Sat, Jan 11, 2014 at 4:25 PM, Spehro Pefhany wrote: > Dunno, but I'd imagine it will either be pretty straightforward to > repair, or about impossible (as in the proprietary micro is fried). > (not to say one couldn't retrofit all kinds of stuff, but that's not > really a repair). Yep, that's my thought too. I have been told the controller still works, and once I have some time my first check will be to see if I can see the unit trying to energize it's AC control circuit. > Assuming you're talking about a thyristor trigger transformer, the > likely culprit is a failure of thyristor (probably a triac/alternistor, > could also be an SCR) or the connections to it, causing the pulse > transformer to die. If you're lucky, the chain of events terminated > there. Yep, that's what I'm hoping. I haven't had time to look into it too much, but I quick glance in there showed a few standard optos and a couple of triacs I think. I didn't have time to write down the part numbers, but then, I haven't had time to look anything up either. If I were able to find a schematic that would help me along, but I hope to be able to do some detective work without too much trouble. The fallback would be to replace the controller (either in whole or in part). Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .