Datasheet-type PDF for the 3SK271, around 32.7 KB, catalogued in the schematic category. The 3SK prefix under JIS denotes a four-terminal N-channel field-effect transistor, a designation commonly used for dual-gate MOSFETs in RF amplifier and mixer stages. When a receiver front end is dead or weak, the sheet provides pin assignment, bias guidance and maximum ratings for testing and substitution. Confirm the marking code on the component against the document first.
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.