Listed as a schematic, the 95.7 KB PDF bearing part number 2SK2160 is most likely the datasheet for an N-channel field-effect transistor. The 2SK prefix follows the JIS/EIAJ convention used for Japanese semiconductors. The name gives no maker or package details, so read them from the document. Repairers use such data to identify the gate, drain and source pins and check rated limits, and to compare a cross-reference before replacing a shorted or open transistor on the board.
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.