A PDF of about 346 KB for the part numbered 2SJ74, filed under schematics although a part-number name like this normally marks a component datasheet. Under the Japanese JIS naming system the 2SJ prefix designates a P-channel field-effect transistor. Technicians use such a document to confirm pinout, package, voltage and current limits before choosing a substitute. The name gives no manufacturer, so compare the marking on the actual part and check that the package matches before soldering in a replacement.
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.