Part code 2SC4440 is all the 97.3 KB PDF name reveals, and the catalogue places it under schematics. Since the JIS system reserves 2SC for NPN transistors intended for high-frequency use, expect a datasheet with electrical characteristics. It opens in any PDF reader. Check the outline drawing and pinout before removal, use the ratings table to vet substitute transistors, and compare the marking printed on the component body to be sure it really is this type number.
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.