PDF of 245 KB titled 2SJ200, which by Japanese JIS convention is a P-channel field-effect transistor; the contents are probably the datasheet rather than a circuit diagram. Use it to read absolute maximum ratings, electrical characteristics and the package outline when diagnosing or replacing this transistor. Before swapping in an alternative, compare voltage, current and power ratings and confirm the lead order, since equivalents can differ in pinout. No maker or revision appears in the file name.
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.