Catalogued as a schematic, but the part number 224CNQ035 follows International Rectifier style Schottky rectifier naming, so the PDF is most likely a component datasheet rather than a board diagram. In that scheme the trailing 035 usually encodes a 35 V reverse rating. Check the forward voltage, current rating, package outline and pinout here before fitting a substitute in a power supply output stage. Any PDF reader opens the 143 KB file. Confirm the marking on the physical part matches before ordering a replacement.
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.