An NPN transistor reference for the 2SC3897, supplied as a 93.9 KB PDF. Part numbers with the 2SC prefix follow the Japanese JIS scheme for NPN bipolar devices, so this should be the datasheet rather than a circuit diagram; the name gives only the number. Expect pin configuration, maximum ratings, gain data and mechanical outline. These help when diagnosing a failed stage, confirming replacement orientation and vetting equivalents. Match the marking on the physical part before relying on the information.
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.