Reference PDF of 178 KB for the 2SC4682. Although catalogued as a schematic, the part number uses the Japanese JIS scheme where 2SC identifies an NPN bipolar transistor, so a datasheet is the expected content. The name contains no further detail. It helps when diagnosing a failed stage: identify the pin layout, read maximum collector-emitter voltage and current, check power dissipation, and ensure any replacement fits the same package and meets the original electrical 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.