Motherboard schematic for the Sony VAIO VGN-C11 and C21 models, supplied as a 2.46 MB PDF. The name gives no MBX board number, ODM project code or revision, so check the markings on the PCB against the title block inside the document. Such diagrams serve for tracing power rails, checking the standby and main voltage chain, and finding the components around a shorted line or failed controller. Any PDF reader will open it. Treat component values with care if your board revision turns out to differ from the drawing.
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.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.