This 132 KB PDF is labelled 50SQ060 and indexed as a schematic, without any laptop model or board number. The code follows the pattern of a discrete semiconductor part number, suggesting a component datasheet with ratings and an outline drawing rather than a board diagram. Technicians use such a reference to check whether a replacement matches in voltage, current and package before soldering. Read the marking on the actual part first and make sure it corresponds to this exact designation and not a similar one.
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.