Schematic PDF for the ASUS GX502LXS motherboard, revision 2.1, a fairly large 14.8 MB document. It should cover power rails, the charging circuit, CPU and GPU supply regulators, and signal connections between components. Use it to follow the power-up sequence, identify missing voltages and check part values during repair. Any PDF reader opens it. Verify that the board name and revision 2.1 printed on the PCB match before trusting voltages, part numbers or connector pinouts.
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 @cynetitsolution. 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.