PDF of 33.4 KB describing the 2SK2016 transistor, an N-channel FET by its JIS 2SK prefix. It is catalogued as a schematic but is best used as a component datasheet. When a FET fails short in a power circuit, a sheet like this gives the pin assignment for diode-mode measurements and the voltage and current limits a replacement must meet. The file name contains nothing beyond the part number, so compare the printed code and package on the board with the drawing inside.
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.