Datasheet-type PDF for the 2SK2740, 138 KB, with a 1-5 suffix in the name whose meaning is not stated, possibly an edition or page range. A separate file under the plain part number also exists, so compare both before relying on one. The 2SK prefix is the JIS designation for N-channel field-effect transistors, and the document should cover ratings, characteristics and pinout. Use it to identify pins, check voltage and current limits and choose a suitable substitute in a repair.
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.