Sony VAIO motherboard schematic for board MBX-250, a 1.68 MB PDF. The name gives no ODM code or revision, and since Sony's MBX numbers span boards from several manufacturers, check the label and revision printed on your PCB against the drawing. The circuit diagram supports tracing the adapter input, charger and regulator outputs, verifying power-good and enable signals, probing test points and finding the capacitor or MOSFET pulling a rail low. Open it in any PDF reader and search by net name.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.