Circuit diagram for the Sony MBX-266 mainboard, distributed as a 1.13 MB PDF. The name gives only the board number, without the VAIO model or revision, so compare the label on the PCB and the title block before use. MBX is Sony's own mainboard numbering. A schematic like this is used to follow power rails, check the sequence of enable and power-good signals, locate components around faults and find shorted lines, with searchable net names in a PDF reader.
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 @schematicslaptop. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)