550WI Schematic?

Hi All.
My DSW PRO 550WI runs for almost a minute and then the power dies. (All the lights go out.) I pulled the power supply board and started looking at it and found that things get past the bridge, but that everything at the output connectors goes dead when things go south. I'll be checking the control signals and such, but it would speed things up a lot if I had an actual schematic. I'm looking up some component data sheets and actually started drawing a rough schematic myself, but this could be quite time consuming. Unpowered circuit tests of the semiconductors have not been revealing so far, but that was just a way to get a quick start before making extensions for the interface plugs. If anyone could provide a drawing, it would be really appreciated.