Compact 23.1 KB PDF named only with the part number 2SK2277. Because 2SK is the JIS prefix for N-channel FETs, the schematic category here most likely holds a short datasheet. It is useful for reading pin assignment, package type and the key limits that a replacement must meet, such as drain-source voltage and continuous current. Open it in any PDF reader. With no package or revision in the name, check the printed marking and case style on the original transistor before choosing a substitute.
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.