Schematic PDF for a Lenovo notebook manufactured by Foxconn, labelled with the project code 661S03; neither the retail model nor the board revision is given. The drawings typically cover power supply stages, the processor and chipset, memory, and peripheral connectors. Use them to measure rails at test points, follow the power sequencing signals and identify parts near a short or burnt area. Compare the code printed on the motherboard with 661S03 before relying on component values, and open the file with any standard PDF reader.
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.