Sized at 111 KB, a PDF for the 2SK2394 that the index lists under schematics, though its JIS-style part number indicates a datasheet for an N-channel field-effect transistor. The name carries no additional details such as package, manufacturer or revision. Use it to check which pin is gate, drain and source, to read breakdown voltage and current ratings, and to compare candidate substitutes. Confirm the actual part marking on the PCB matches 2SK2394 before relying on this information.
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.