Here the 2SK1422 transistor is documented in a 103 KB PDF filed under schematics, though content is most likely a datasheet rather than a board diagram. The 2SK prefix denotes an N-channel field-effect transistor under JIS conventions. No package or electrical figures appear in the name. Check the sheet for pin order, maximum drain-source voltage, drain current and gate threshold, and compare the part marking on the device before using the data for diagnosis or replacement.
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.