Small 33.2 KB PDF covering the 2SK1478, written in lowercase in the original name. The 2SK prefix belongs to the Japanese semiconductor designation for N-channel field-effect transistors, so despite the schematic label this is likely a short datasheet or a summary page for the part. Use it to look up pin connections, package type and key ratings before testing the device in circuit or sourcing a replacement. Because the file is compact it may omit curves, so cross-check critical values with another source.
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.