Sony MBX-224 board documentation for project M960/M970, H model, revision SA, packed as a 952 KB RAR. The H and L model split implies separate higher and lower specification boards, and the sibling MBX-223 covers the L version. Expect schematic pages to trace rails, check voltage at test points and identify components on a shorted line. Make sure your board reads MBX-224 rather than MBX-223 before relying on values, since the two variants differ in populated circuitry.
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.