Lenovo E47 laptop schematic for the Quanta KL9A motherboard, a 1.02 MB PDF that appears to match another file for the same board. Quanta labels its designs with short project codes such as KL9A, normally found on the PCB silkscreen. Technicians rely on such drawings to trace power from the adapter input to each rail, check enable and power-good signals, follow lines to connectors and locate parts behind a short. No revision is stated in the name, so check the document's revision against your board.
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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The same file was posted more than once. If one link is dead, try the next.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.