Reference document for the 2SK2679, a 393 KB PDF in the schematic category. The 2SK prefix is the Japanese JIS registration for N-channel field-effect transistors, so this is a component datasheet rather than a circuit diagram. Expect absolute maximum ratings, electrical characteristics, curves and a package outline. A repairer uses it to read the pin layout, judge whether in-circuit readings indicate a short and find a suitable equivalent. Confirm the part marking before relying on its data.
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.