Archive for the Apple A1425 computer, around 1.79 MB, with no further description in the name. A1425 is the Apple model number, and the logic board inside will carry its own 820-xxxx number, which you should check before using whatever schematic, boardview or firmware the archive contains. Open the archive first to see what is included. Such documentation is used to trace power rails, locate parts and test points, and isolate shorts on the logic board during component-level repair.
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 @LaptopsBoardview. 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.