A compact 122 KB PDF named after the 2SK2260, filed in the schematic category but most likely the datasheet for that device. Japanese JIS/EIAJ part numbering uses 2SK for N-channel FETs, which is all the name reveals; maker and package are not stated. During repair, a sheet like this answers practical questions: which leg is the gate, how much voltage the drain tolerates, and what on-resistance a substitute must match. A PDF viewer is all that is needed to open it.
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.