I have had one of these laying around for years. It's a decent rackmount delay, with looping and modulation. I want to mod it so that I can get square wave modulation. I can probably follow things around inside to disconnect the existing lfo and substitute one of my own, but I would love to see a schematic.
I looked at the current Ibanez website and I can't even figure out how to email them to see of they have old info.
I found one manual for sale, I may have to bite the bullet.