Quanta R75 schematic in PDF form, 2.82 MB. The file name names only the project code and gives no brand, laptop model, board number or revision, so match the R75 marking on the motherboard before use. A schematic like this is used to trace power rails from the adapter input through the regulators, follow enable and power-good signals and identify parts near a short. Quanta manufactures boards for several laptop brands and typically uses DA-prefixed board numbers containing the project code, which help confirm a match.
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 @pepeelectronica. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.