Reference PDF for the 2SC4869, 126 KB, sorted into the schematic category. Nothing else is given in the name. Under the Japanese JIS/JEITA scheme the 2SC prefix designates an NPN bipolar transistor, so the file is best read as a datasheet for that single part. It normally lists absolute maximum ratings, electrical characteristics and package dimensions. Use it to confirm pinout before testing junctions, and to check that a replacement offers the same or higher voltage, current and frequency ratings.
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.