A 320 KB PDF for the 2SJ380, catalogued under schematics but by its number a transistor datasheet. In JIS designation, 2SJ parts are P-channel field-effect transistors. The name reveals nothing more, so manufacturer and package must be confirmed from the document itself and the marking on the board. Technicians rely on such sheets for pinout, drain-source voltage, drain current and on-resistance when testing a suspect device or choosing a replacement with equal or better ratings.
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.