Archive for the Sony MBX-130 motherboard with project code MS02. This is one of the older MBX numbers in Sony's Vaio range, and no revision is mentioned in the name. The 1.15 MB RAR most likely contains a schematic used for following power rails, locating test points and checking components near the chipset and charger. Open it with WinRAR or 7-Zip, and check the board marking and revision on the PCB itself, since older Vaio boards often had several revisions with differing parts.
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.