A schematic diagram for Acer hardware (board 14277-1M). Shared as “AFS Acer Aspire E5-773 Brook_SLU 14277-1M PDF.rar” — a .rar file, 2.64 MB.
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 @afsschematicfree. 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)