Here is a compact 94.6 KB PDF named for the transistor type 2SC4660. The name points to the part itself rather than any board or appliance. Under the JIS system, 2SC marks an NPN device for high-frequency service, so the file is most probably a datasheet. Use it to read the pin assignment and SMD marking code, along with the maximum voltage and current limits and the gain grades. That helps when a burnt part has to be identified or replaced with a close equivalent.
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.