I attach three pictures of the animal I picked up in apparently perfect serviceable condition. Though I am moderately good at deciphering dc power supplies, this very high power unit has left me baffled for a long time. If I can get it going, I can put it to good use, especially the 3.3/5V 150A output. There is no data forthcoming from IBM websites.
I can feed it at 350V dc from external PFC unit.
Obviously, no connectors are available, and I have to devise other ways, but that has not deterred me in the past.
I did do some sort of pinout identification, but the problem is finding what will 'enable' the output.
I would be grateful for any leads.