The 2SJ349 P-channel FET is described in a 418 KB PDF, catalogued under schematics though it is a component datasheet. JIS semiconductor numbering uses the 2SJ prefix for P-channel field-effect transistors. No manufacturer, package or revision appears in the name. Open it in a PDF reader to check terminal layout, breakdown voltage, drain current and on-resistance, then measure the suspect part and verify its case marking matches before ordering or fitting a replacement.
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.