Someone had requested the MDD 2003 motherboard schematics, whose code is 820-1476-A, on Vinafix
here. No idea if that person's request was granted somehow.
I'm completely new to schematics websites, and to people/companies that reverse-engineer schematics, so I'm looking everywhere I can without being quite sure where to look, without many leads, but anything I find, big or small, I will share here.
I also found
this page with lots of various early and new-ish Apple schematics shared by some Brazilian guy, but nothing for the MDD as far as I could tell. (It gets updated from time to time.)
In Louis Rossmann's forum, someone mentioned Vinafix, vlab.su, chinafix as good schematics resources, and implied there are many more, and someone else there suggested doing websearches with terms such as "схемы macbook все модели" etc..
Still looking around, but so far, nothing.
Edit: Might as well share Internet Archive links I found of many 68k Mac schematics:
https://archive.org/details/Macintosh68kSchematicsAnd Apple IIgs schematics:
https://archive.org/details/Schematic_Diagram_of_the_Apple_IIgs/page/n9/mode/2upAnd Apple II+:
https://archive.org/details/Schematic_Diagram_of_the_Apple_IIApple IIc:
https://archive.org/details/Schematic_Diagram_of_the_Apple_IIcApple I:
https://archive.org/details/Apple1Schematic1976Xbox 360 (just because it's a G5 successor of sorts):
https://archive.org/details/Xbox_360_Xenon_schematics/page/n23/mode/2upApple III schematics (and lots of other Apple III goodies):
https://archive.org/details/dvdrom-wap-apple3Not like we see those everyday.