Schematic for Apple logic board 820-2915, revision A, in PDF format at 1.99 MB. Apple uses the 820-xxxx code on its logic boards, so confirm the number and revision printed on your PCB match. The document covers power regulation, the SMC, charger and main interfaces, which helps you trace a missing rail, test enable and power-good signals and work out the cause of a short. Open it in any PDF reader and search by net name to move between pages.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @one5technology. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)