The 2SJ382 P-channel FET is described in this 96.9 KB PDF, filed as a schematic though it is a component datasheet. Under JIS naming, 2SJ indicates a P-channel field-effect transistor. No manufacturer, case style or revision appears in the name. A repair technician uses such a sheet to confirm which terminal is gate, drain and source, to read voltage and current limits, and to judge equivalents, checking the body marking against the package drawing before testing or replacing the part.
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.