A compact PDF of 53.8 KB indexed as a schematic, named only after the part number 1SS350. That code follows the Japanese JIS designation for small-signal diodes, a series used largely by Toshiba, so the document is most likely a component datasheet rather than a board diagram. Technicians use such sheets to confirm pinout, package marking, forward voltage and reverse ratings before swapping a suspect diode. Check the SMD marking code on the part against the sheet, because tiny packages are easy to confuse.
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.