Datasheet PDF for the 2SK1771, about 305 KB in size. Under JIS conventions, the 2SK prefix identifies an N-channel FET; the file is listed as a schematic but the name refers to a single part. Expect ratings, electrical characteristics, graphs and package information. It is used to identify terminals before testing, confirm the device specification and select a compatible replacement when the original has shorted. Match package, voltage and current ratings, and verify the body marking corresponds to this number.
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.