This is my first post on here, so apologies for anything wrong.
I needed to do some repairs on an AT8533x phantom powering unit (found 5 faults eventually!). I couldn't find the schematic for it, so having traced it out I thought others on here who are into the electronics side of things might find it useful / interesting. This is my best understanding of it - of course it's possible that it may contain errors.
I was intending posting it as a reply to another post that has some schematics of adaptors / battery-box ideas, but now I can't find that one again. Maybe someone will add a link from there to here, or vice versa.
Also this was my first attempt at using TinyCAD to draw schematics - still learning.... The definition is a bit less that I expected, so hope it turns out OK on here. (Originally it was a png file, but that's not in the allowed list of file types for here - I guess there must be a good reason for that.)