Datasheet-type PDF of 110 KB for the 2SK1414, indexed as a schematic. Its 2SK prefix comes from Japanese JIS numbering and identifies an N-channel field-effect transistor; package and manufacturer are not given in the name. Open it in any PDF viewer for the pinout and maximum ratings. A technician uses these when probing a suspected failed transistor, verifying that a replacement has adequate voltage and current capability, and orienting the part correctly on the board.
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.