Datasheet-style PDF of 88.2 KB for the semiconductor 2SC4475, catalogued in the schematic section. The 2SC part of the code comes from the Japanese JIS system and denotes an NPN bipolar transistor rated for high-frequency service. Nothing else about the device is stated in the name, so the contents must be read for package and ratings. Repair work typically relies on such a sheet to verify base, collector and emitter pins, absolute maximum values and equivalent parts before soldering in 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.