Only the part number 2SJ275 appears in the name of this 97.0 KB PDF. That code follows Japanese JIS numbering, where 2SJ indicates a P-channel field-effect transistor, so expect a datasheet even though the catalogue type says schematic. Such a reference helps confirm whether a failed component on a power supply or amplifier board can be swapped directly, by comparing ratings, threshold voltage and outline drawing. Before relying on it, match the printed marking on the original transistor and check the pin order shown for the package.
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.