RAR archive labelled EM_IW522 at version 2.0, about 4 MB in size. The name does not say whether it holds a schematic, boardview or firmware dump, nor which device the board belongs to, so open it and inspect the contents before use. If it is service documentation, use it to trace power rails and locate components. If it carries a firmware image, compare the board marking and revision on the PCB against V2.0 and back up the original flash chip before writing anything with a programmer.
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 @fileservicelaptop. 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.