The 2SJ316 is the subject of this 91.5 KB PDF. Its name gives only the semiconductor type code, so no equipment model can be inferred. JIS registration uses 2SJ for P-channel FETs, meaning the content is most likely a component datasheet. Use it to read the gate threshold and drain-source limits, and to identify pins on the package. When a direct replacement is hard to source, compare these figures with candidate parts and keep the same polarity and case style.
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.