Datasheet-like PDF, 42.5 KB, for the 2SJ583LS and filed as a schematic. Japanese JIS designations starting with 2SJ belong to P-channel FETs, and the LS suffix points to a specific variant whose meaning is not given in the name. Inside you should find pin assignment, voltage and current ratings, on-resistance and an outline drawing, the basics for in-circuit diagnosis or picking an equivalent. Check the full printed code and package on the part before trusting it for a swap.
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.