RAR archive of 1.05 MB for N5010 with the board-style number 09909-SB in the name; the contents type is not stated, so it may hold a schematic, boardview or firmware. A five-digit number followed by a suffix such as SB resembles Wistron board numbering, though the archive itself should confirm the maker. Extract it and inspect the files: a schematic helps trace rails and signals, a boardview locates parts and test points, and a firmware dump must be written only after backing up the original chip. Match the board number on the PCB first.
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 @alischematics. 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.