A 320 KB PDF dedicated to the 2SC3011, indexed as a schematic but most likely a transistor datasheet. Nothing besides the part number appears in the name. Under Japanese JIS numbering, 2SC refers to an NPN bipolar transistor of the high-frequency type. A repair tech can use the pin diagram, rating tables and package drawing to test the part with a multimeter or judge whether an equivalent will fit. Match the marking on the device, including suffix letters, before relying on it.
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.