Part-number document for the 2SJ561, stored as a 160 KB PDF and tagged as a schematic. In Japanese transistor numbering, 2SJ stands for a P-channel FET, so the content is almost certainly a component datasheet, not a full circuit for any device. Repair technicians rely on these sheets to verify which pin is gate, drain and source, to confirm voltage and current limits, and to judge whether an alternative part is a safe swap. No brand, revision or application is stated in the name, so read the sheet itself for those details.
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.