VAX 11/750 power supply fault

Here's the latest update on the power supply adventures... Tonight I put a load, as suggested, on the 2.5V power supply (and the 5V PS) by attaching a pair of automobile headlamps to each supply. I wired both lamps (for each PS) in parallel with each other, and with the two filaments (Hi- and Lo-Beam) in parallel, too. That gave me four filaments for each power supply as a load. As a result, when I power up, happily the "2.5V FAIL" and the every-8-seconds "OVER VOLTAGE" indications are no longer seen. The voltage on the 2.5V PS output is a rock steady 2.5V. However, on the 5V PS, I'm seeing only +0.85V on the outputs, and I am still seeing the "REG FAIL" indication on the power controller. Obviously there's still a problem in the 5V PS. Using the "VAX-11/750 H7104 Power System Technical Description" doc's fault isolation procedure, which suggests that the +/-15V regulator is broken in the 5V PS, I checked the +/-15V outputs. I should see +15V and -15V, but I'm seeing +7.9 (or so, it's not quite stable) on both outputs even the one that should be negative. The fault isolation procedure in that doc doesn't go any further at this point than to suggest a replacement of the entire 5V power supply box. I'd love to repair it, but I'm certainly not as smart as Tony, nor am I likely to ever figure out the faulty component(s) directly. There is a main 'motherboard', two plug in PCBs, and other bolt-on components galore, and while I can follow some logic circuit diagrams, I'm clearly out of my league with analog/PS stuff. Besides, I haven't been able locate schematics for this power system. Soooo.... Anyone have a spare H7104D 5V PS for this baby??? ;P Aside from the tongue-in- cheekiness, does anyone have schematics and/or Engineering Drawings for this 11/ 750. Maybe I could actually try to sort it out if I had some more information, at least until I electrocute myself! :o Thanks! - Jared