These are links to the official Apple Macintosh SE/30 schematics.

Source website: https://museo.freaknet.org/gallery/apple/stuff/mac/andreas.kann/schemat.html

Consult other sources for the BOMARC schematics.  For example, from
Macintosh Repository:

https://www.macintoshrepository.org/875-macintosh-se-30-schematics-and-repair

The Internet Archive's BOMARC schematics copy.  Use the Macintosh IIcx
schematics from the Internet Archive's source for reference since they
are practically the same as the Macintosh SE/30.

https://archive.org/details/Macintosh68kSchematics