Schematic in PDF for the ASUS K53SV notebook; the name does not state the mainboard revision. The diagrams cover the power supply circuits, charger, CPU and GPU power and signal paths, letting a technician trace rails, read component values and work through the power-up sequence while diagnosing a fault. Any PDF reader opens it, and text search helps locate nets and reference designators. Compare the board revision on the PCB with the title block before relying on values, as revisions can differ.
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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.