Saw an earlier post about this, but no luck finding the schematic. I too have a bad PS in my 5403. Unfortunately the pdf available (from BAMA), while it has the component list and location grid, does NOT actually have the schematic for the PS. (Or perhaps I have finally gone completely mad.)
Does anyone happen to have this? Any help is greatly appreciated!
The problem seems to be with the +5 and +15 supplies. I already replaced a shorted electrolytic and bridge, but there's still something wrong.