Named after the 2SK210, this 362 KB PDF sits in the schematic category but most probably contains the datasheet for that JIS N-channel FET. The 2SK prefix is the Japanese designation for N-channel field-effect devices. Expect pin assignment, package outline and electrical ratings. It supports in-circuit diagnosis and choosing a suitable substitute part; before fitting anything, verify the lead order and confirm the body marking matches the device the sheet describes.
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.