PDF schematic labelled Quanta G35, about 3.14 MB. The name gives no laptop brand, model or revision, so the exact device must be confirmed by comparing the Quanta project code printed on the motherboard. Quanta usually marks its boards with DA-prefixed numbers that include the project code. A schematic like this shows power rails, enable signals, the charging circuit and connector pinouts. It helps when measuring voltages and tracing faults from the adapter input to the CPU power stage.
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 @afsschematicfree. 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.