Data for the 2SC4694 transistor in a 111 KB PDF, catalogued as a schematic. The 2SC prefix identifies an NPN bipolar part under the Japanese JIS scheme, so the file is most likely a datasheet. It should include pin assignment, package drawing, voltage and current limits and gain figures. Technicians consult it to measure the part correctly and to pick a replacement with equal or better specifications. Check the component marking before relying on these values.
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.