All available at this moment schematic diagrams and "Board View" files for
iMac, MacBook, MacBook Pro, MacBook Air, PowerBook G4, iPad, iPhone (2002-2015)
287 schematic diagrams (circuit diagrams) for logic boards,
LIO/RIO, Audio, ALS, LED, MXM VGA Cards and other small daughter boards.
plus 180 "Board View" files* and component layouts .
This is the best collection of documents for Apple in the web and it's less than 60 US cents for one file (document)!