Short PDF of roughly 41.2 KB for the 2SJ289. Nothing in the name besides the part number points to a specific device. JIS designation 2SJ refers to P-channel field-effect transistors, so this is presumably a condensed datasheet. The small file size suggests a brief summary of ratings and pinout. A technician can use it to confirm terminal functions before in-circuit measurement and to check limits when replacing the part. Verify the component marking and keep the same package type.
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.