Second copy of the documentation for Sony motherboard MBX-224, M960/M970 project, H model at revision SA, in a 952 KB RAR archive. It matches the other copies in size and probably in contents. Open the extracted schematic in a PDF viewer to trace the adapter, charger and regulator circuits, confirm standby and main rails, and locate a shorted part. Before trusting any value, check the MBX-224 marking and revision on the board, since the L model version uses a different number.
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.