RAR archive of 2.33 MB labelled only X41; the name does not state brand, board number or the contents, which could be a schematic, boardview or both. Extract it with WinRAR or 7-Zip and inspect the files to see what is included. Repair documents of this sort are used for tracing power rails, locating components and checking test points. Confirm the board number and revision printed on your PCB match the documents inside before trusting any value or connection.
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 @ITHINKHS. 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.
7-ZipWinRARThe Unarchiver (macOS)