Archive with service documentation for a Sony VAIO mainboard numbered MBX-196, which the name ties to a Quanta GD2 design at revision 2A. Sony assigned its own MBX codes to boards built by ODMs, so the Quanta project code GD2 is the more useful reference when cross-checking schematics. Expect a schematic for tracing power rails, signal paths and the standby circuit. Unpack it with WinRAR or 7-Zip and compare the MBX label and the Quanta revision printed on the PCB before relying on any value.
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 @alischematics. 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.