Schematic for the Sony VAIO VGN-AR series in PDF format, 1.07 MB; the name gives no MBX board number or revision. The drawing helps with tracing power rails, locating the regulators and switches behind a no-power fault and following signals to connectors and controllers. It opens in any PDF reader. Since a VAIO series can ship with more than one motherboard variant, read the board code in the title block and compare it with the MBX label on the PCB before using the values for repair work.
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.