The 78.6 KB PDF 30SLJQ045 is labelled a schematic, yet the name follows the pattern of a rectifier diode part number, pointing to a single-part datasheet. No laptop, board number or revision is mentioned. Open it in a PDF viewer to look up reverse voltage, forward current, thermal resistance and mechanical dimensions. When a diode near a DC jack or regulator tests shorted, this kind of sheet helps confirm a correct replacement; verify the exact code and suffix on the original part first, since grades in the family differ.
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.