Catalogued as a schematic, this 49 KB PDF is named after the 2SC2613, a part number in the Japanese JIS scheme, where the 2SC prefix marks an NPN bipolar transistor. The file is most likely the manufacturer datasheet rather than a board drawing. Use it to check the pinout, package outline, maximum voltage and current ratings and gain before fitting a replacement. Compare the marking on the original part, since small-signal transistors often carry only an abbreviated code such as C2613.
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.