Were these ever scanned/redrawn? I'm trying to fix the TP Ethernet on my cube and it seems that they changed one of the ICs between the 25MHz 040 and 33MHz 040 boards (Intel/AT&T PE82506TB to AT&T T7213).
Of course, if there's anyone in the Bay Area interested in taking a look at the board, that would work too, since I am mostly clueless with regard to EE.
Channelu.com has a note about the 25Mhz Cube schematics being available soon.
https://web.archive.org/web/20070901000000*/http://www.channelu.com/NeXT/Black/index.html (
https://web.archive.org/web/20070901000000*/http://www.channelu.com/NeXT/Black/index.html)
That's been on the page for quite a long time, so it's doubtful that Randy ever received them. Other than that, I'm not aware of any available schematics for the 25Mhz main boards.