Sony VAIO schematic in PDF format, 847 KB, covering the MBX-217 motherboard, with M851 most likely the ODM project code carried alongside it. MBX numbers are Sony's mainboard designations, while M-prefixed project codes are typical of Quanta-style or similar ODM naming, though the name alone does not confirm the builder. Use the diagram to trace power rails, the charging circuit and signal lines. Make sure MBX-217 and the revision on the PCB match the drawing before relying on it.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.