At 194 KB, this PDF is catalogued as a schematic but carries the part-style name 111cnq045a, with no laptop model, board number or revision. It sits alongside a 110cnq045a sheet, suggesting closely related variants in one component family. Such documents give forward and reverse ratings, pin assignments and case dimensions, which help when a rectifier stage is shorted or a replacement must be chosen. View it in any PDF reader and verify the full marking on the part before substituting anything.
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 @cyberlanelectonik. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.