PDF schematic of a Lenovo notebook motherboard designed by Foxconn, carrying the project code S09; the actual product model is not given in the name. Foxconn uses short internal codes like this for its Lenovo designs, and the same code generally appears on the PCB. Use the drawings to trace standby and main voltages, check the embedded controller and power-switch circuit, and locate components and test points while diagnosing no-power or no-display faults. Confirm the board marking matches S09 before relying on values.
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