Revision 2A schematic of the Sony MBX-196 mainboard, manufactured by Quanta under project code GD2. Quanta typically marks its board revisions with a number and letter like 2A, so check the code printed near the board edge against this drawing. The 1.41 MB PDF covers the circuitry used in diagnosis: power rails, charging and regulator stages, and signal links between the major chips. It is handy for locating components and test points when a VAIO shows no power, no display or charging faults.
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