A 368 KB PDF covering the 2SK2998, a part whose 2SK prefix follows the Japanese JIS scheme for N-channel FETs. Although the catalogue lists it as a schematic, the name points to a single-component datasheet. Open it in any PDF reader to read the pin assignment, package outline, drain-source voltage rating, on-resistance and gate threshold, which are the figures that matter when choosing an equivalent transistor or testing a suspected shorted MOSFET with a multimeter.
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.