The 2SK2545 is the subject of this 415 KB PDF, catalogued as a schematic but by its name a discrete transistor document. JIS part numbering assigns the 2SK prefix to N-channel field-effect transistors; the maker and package are not given in the name. Open it in an ordinary PDF reader to look up pinout, drain-source voltage, current capability and package drawing. These values guide the choice of an equivalent when the original is unavailable and help when checking a shorted output device.
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.