These documents did not originate from me. I came across them years ago somewhere. The schematic and overlay seem to be accurate as I have used them to fault diagnose a couple of units before. If anyone can add to this archive of info with internal photos, IC part numbers etc it would be greatly beneficial to guys like us in the group who are intent on keeping the Simmons name alive Richard 20 March 2010 I removed the items due to a complaint. Sorry