Covering the 2SJ589LS, this 33.2 KB PDF is catalogued as a schematic, though the name points to a component datasheet. The 2SJ prefix is the Japanese JIS designation for P-channel field-effect transistors, while the LS suffix marks a variant whose meaning the name does not state. Look inside for pin configuration, maximum ratings and on-resistance when testing or swapping the device. Confirm the complete part code and package on the board, as suffix variants may differ in outline.
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.