Schematic in PDF for Apple logic board 820-2915 at revision A, the board used in A1286 MacBook Pro 15-inch units. Apple 820-prefixed numbers identify logic boards, and the suffix letter marks the revision. Technicians rely on these diagrams to trace power rails, follow the power-on sequence, find the parts in a failing circuit and check where a short sits. Opens in any PDF reader. Confirm that the number etched on your board matches before comparing values.
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 @schematicslaptop. 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)