Schematic in PDF format, 1.09 MB, for a board named P552SJ, with the RG suffix usually indicating a regional or repair-group variant of the drawing set. The name does not state the laptop brand or a board revision. Technicians use such a document to follow power rails from the charger circuit to CPU and memory supplies, read signal names, and identify component values around a failed section. Open it in any PDF reader and verify the board marking on the PCB matches P552SJ before replacing parts according to the drawing.
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.