Part 1SS352 is the only information in this 68.4-style short PDF name; the file is 69.2 KB and most likely the data sheet for that small-signal silicon diode, as indicated by the JIS 1SS prefix. Expect electrical characteristics, maximum ratings and a package drawing rather than a board diagram. Technicians use it to confirm anode and cathode pads and to evaluate replacement candidates. Open it in any PDF reader, and match the marking code and package on the PCB before soldering a new part.
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.