Here is a 49.4 KB PDF for part 2SC4067, placed under schematics but named like a manufacturer datasheet. In the JIS system the 2SC prefix identifies an NPN bipolar transistor. The name carries no package, brand or revision detail. For repair use, the key sections are usually the absolute maximum ratings table, electrical characteristics and the mechanical outline showing which pin is base, collector and emitter. Use those to test a suspect part and pick a substitute, after confirming the marking on the board.
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.