Sony MBX-145 motherboard material in a 1005 KB RAR archive, with no model, ODM project code or revision given in the name. As with other MBX numbered VAIO boards, the actual design came from an outside manufacturer, which the title block inside should identify. The contents most likely include a schematic for tracing power rails, checking standby and charger circuits and locating parts and test points. Read the board number on the PCB and match it, along with the revision, before using any values from the drawings.
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.