A 107 KB PDF whose name holds only 2SJ266. Per Japanese JIS numbering, 2SJ indicates a P-channel FET, so the content is expected to be a component datasheet rather than a circuit schematic, despite the catalogue type. Use it to look up pin assignment, breakdown voltage, continuous drain current, on-resistance and the case outline before testing or replacing the part. Any PDF reader handles the file. Match the transistor's printed marking and footprint carefully, because lead order varies between packages.
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.