A schematic diagram for Sony hardware (board MBX-156). Shared as “MBX 156-ms20-vgn-ar_(Luirons_Esquemas).rar” — a .rar file, 2.87 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 @Satale_bios_esquemas_Laptop. 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)