Sony VAIO VGN-C22CH material for the MS60 design, identified with the Sony main board number MBX-163, in an 866 KB RAR. The contents are most likely the motherboard schematic, though the name does not say so. Sony used MBX numbers for its laptop motherboards, while ODMs such as Foxconn and Quanta used their own project codes, and MS60 is probably one of them. Confirm that the board reads MBX-163 and not the closely related MBX-159 before you trace rails, signals or test points with 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.