Datasheet-style PDF named after the 2SJ342 and indexed as a schematic, 311 KB in size. The name itself identifies only the semiconductor type. Following Japanese JIS designations, 2SJ indicates a P-channel field-effect transistor. Use the document to read pinout and thermal limits, then test the part out of circuit with a diode-mode meter if a short is suspected. If the original part is unavailable, compare ratings carefully before choosing an alternative device with the same footprint.
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.