Part number 1SS362 is all the file name reveals; the 69.1 KB PDF should be the specification sheet for this small-signal silicon diode, as the JIS 1SS prefix indicates, rather than a full board schematic. Use it to read the marking code, check which terminal is anode and cathode, and compare maximum reverse voltage and forward current against a proposed substitute. Any PDF viewer can display it. Make sure the package on the board matches the drawn outline before replacing the component.
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.