Catalogued as a schematic, this 88.5 KB PDF is named only 2SJ230, a JIS code in which the 2SJ prefix identifies a P-channel field-effect transistor. The file is therefore expected to be a datasheet for that single part. It gives the ratings, electrical characteristics and pin layout a technician needs to test the transistor, interpret readings in circuit or choose a cross-reference. Any PDF viewer opens it. Compare the body marking and lead order of the original before fitting 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.