Indexed as a schematic, this 70.2 KB PDF carries the plain part number 1SS361 with no suffix, device or board details. The 1SS prefix in Japanese JIS numbering identifies a small-signal silicon diode, so the file is most likely its data sheet. It is handy for verifying anode and cathode orientation, marking code and electrical limits while replacing a faulty diode. A separate F-suffix variant exists in the same series, so confirm which version is fitted before relying on these figures. Any PDF viewer opens it.
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.