Semiconductor datasheet, 102 KB PDF, for the 2SK1467, judging by the Japanese 2SK prefix that marks N-channel FETs. The catalogue lists it among schematics, but no equipment model or board number is mentioned. Technicians refer to such sheets to read electrical characteristics, maximum drain-source voltage, drain current and pinout, and to match a replacement in a power supply or driver stage. Open it in a standard PDF reader and verify the marking on the fitted part before acting on the specifications.
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.