A 347 KB PDF catalogued as a schematic but named after the semiconductor part number 2SC2240. Under the Japanese JIS naming system the 2SC prefix marks an NPN bipolar transistor, so the document is most likely the component datasheet. Technicians use such a sheet to check pinout, package outline, maximum voltage and current ratings and gain classes before fitting a replacement. Confirm the marking on the original part, including any suffix letter, and compare ratings when 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.