Datasheet for the 2SK771 N-channel FET, supplied as a 79.5 KB PDF. Only the part number appears in the name. Under JIS conventions the 2SK prefix marks an N-channel field-effect transistor, and this sheet should list ratings, typical characteristics and the package with pin assignment. Useful for verifying a suspect device, orienting it correctly and judging equivalents. Open with a standard PDF reader, and match voltage, current and footprint before soldering in a replacement part.
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.