Catalogued under schematics, this 123 KB PDF is named 80CPT015, a part code in International Rectifier style that most likely refers to a Schottky rectifier datasheet rather than a circuit diagram. The name gives no device or board. Technicians read such a sheet to identify terminals, case style and forward and reverse characteristics when diagnosing a short in a supply. A similar 80CPTN015 sheet is indexed, so check the exact letters printed on the component before choosing which document applies.
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.