A while ago, I received a copy of the schematics for the Convex C1 Supercomputer. It took me a while to scan them all, but now that that's done, I've made them available on the Convex Documentation page.
Now, some pages appear to be missing, and these are scans of photocopies, and for some of the pages the quality of the photocopy isn't too great, but this should still be very useful for debugging the system.