I once repaired one of these PSU's. Unfortunately, no notes, no pics and my memory isn't that good.
I do remember being a little awry of the sizes. It's a big desk with a small PSU. That's why I had a look in the manual, that states 95W, which is minimal IMHO for a 24 into 12 desk. I mean, even the smallest Soundcraft has a 150W PSU and that one gets hot...
If it were my desk, I'd source a 250W standard PSU and replace the proprietary connector.
But maybe there's also 24V or so for the meters?
I don't have a service manual, not schematics. Any chance you can open the beast and have a look at the number of wires and markings on the PCB? Maybe take some pics and post these here?