Schematic for the ASUS K53SV notebook, delivered as a 593 KB PDF. Neither the board number nor the revision appears in the name, so read the title block inside the document and compare it with the silkscreen on the mainboard before you rely on values. Technicians use a diagram like this to follow the charger circuit, the CPU and GPU power stages and the system rails, and to trace signals between the chipset and connectors when diagnosing no-power, no-boot or short-circuit faults. Any common PDF reader is enough to view it.
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 @hrtechno. 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.