PDF schematic for the ASUS G531GT gaming notebook, revision 1.5, a 13.2 MB document. Circuit diagrams like this are used to trace power rails from the charger and battery circuit through the VRMs, read the power-on sequence, follow signals between the CPU, GPU and connectors, and find the expected values of resistors and capacitors. Any PDF reader opens it, and searching net names speeds up work. Make sure the revision silkscreened on the mainboard matches 1.5, since earlier or later revisions can differ in circuits.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.