Apple logic board schematic for 820-3024, supplied as a PDF inside a 1.19 MB RAR archive. No revision letter appears in the name, so check the suffix printed on the board before using component values or rail details. After extracting, open the PDF in any reader and search by net or reference designator. Technicians rely on such drawings to trace power rails, understand the power-up sequence, verify SMC and charger signals and identify which part is likely to cause a short.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.