Reviving DEC RX01 power supply

I've got a H771-A (120V/60Hz) that's acting up on me. Part of an old PDP-11/03 that I'm trying to get back on its feet. As I've done with 4 or 5 other RX units in the past couple of years, after cleaning it up and reforming the capacitors, but before plugging everything together, I wanted to check output voltages. I'm sure glad I did because this guy is not normal! Where you usually see 24V, I'm getting 42V! And the so- called 'Raw DC' which is normally around 10V is 17V. At least the +/-5V lines are more or less correct at +5.1V and -5.3V, respectively. I need some help here. I've checked the printset on this, and frankly, this analog stuff is so much voodoo (to me). I get lost pretty quickly unless the circuit is simple, say, like a flashlight. Anyway, I've checked a number of voltages and voltage drops at various places[1] that I thought might lead me to something, but I can't say that I'm any wiser now. I'm sure this is fixable, even by me, IF I can locate out the faulty component(s). Hints or guidance on what else I should look at would surely be appreciated! - Jared [1] Here are voltage readings taken at a few locations: - Transformer outputs (these look normal): blue: 27.8VAC purple: 11.2VAC - PCB connector P1: 2 (blu): -5.3v 3 (blk): 0v 4 (gry/red): 5.1v 5 (blk): 0v 6 (red): 42v (should be 24v!!!) - PCB connector P2: 1 (org): 17v (should be 9.5v!!!) 3 (blk): 0v 4 (gry/red): 5.1v 5 (blk): 0v - Voltage drop across: D5 15v Zener: 17v D11 6.8v Zener: 7v R12: 25v R13: 12v