Service archive of 1.75 MB for the Sony VAIO VGN-AW series, covering the MBX-194 motherboard. The name does not state the document type, but at this size it most likely contains a schematic, perhaps with extra pages. Technicians use such diagrams to follow power rails, check the power-on sequence and find the parts behind a no-power or no-display fault. Sony MBX numbers identify the main board, so make sure the MBX code on your PCB is 194 before measuring against these documents.
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 @generalschematics. 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.