The 2SJ511 named in this 417 KB PDF is a JIS-coded semiconductor, the 2SJ prefix signalling a P-channel field-effect transistor. Despite the schematic tag, the content should be a datasheet rather than a device diagram, and the name gives no model, board or manufacturer. Use it to look up drain-source breakdown voltage, current capability, gate charge and the pinout drawing when diagnosing or replacing a shorted switching element. Cross-check the package and markings on the board before installing any substitute.
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.