We had the rare thunderstorm here and my Elgar 1100 UPS turned into a large brick. I've got the schematics for the 1600, but not the 1100-- and I'd like to have it in hand before I go digging into the rat's nest of heavy wire. I've only had to work on it once before to replace a 50W zener, but this looks a little more involved. Can anyone help? If not, I think I can use the 1600 material to guess what's going on. it's close but not quite a match. Thanks, Chuck