A compact 32 KB PDF for the 2SK2130, indexed as a schematic yet named by part number only, which normally points to a short datasheet. Parts with the 2SK prefix are N-channel field-effect transistors under the Japanese JIS scheme. No manufacturer or package is given in the name. A small file like this usually covers ratings, electrical characteristics and pinout, which is enough to confirm a replacement or identify the drain, gate and source pins when probing in circuit.
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.