Component datasheet in PDF form for the 2SJ284, roughly 81.4 KB. The file name names only this part, with no device, board or revision mentioned. Under Japanese JIS numbering, 2SJ designates a P-channel field-effect transistor. The sheet should provide pinout, absolute maximum ratings and package dimensions for use on the bench. Check pin functions before probing, test for drain-source shorts, and when substituting choose a part with the same polarity, footprint and sufficient voltage and current headroom.
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.