At 318 KB this PDF, identified only by 2SC3429, is the largest of the series and is listed under schematics. Japanese JIS rules assign the 2SC prefix to NPN bipolar transistors, so it most likely contains the component datasheet. Use it to identify leads, read voltage and current ratings, and confirm a suitable replacement or equivalent. Since the name omits package, maker and gain grade, check the physical marking, often just C3429, and the footprint before ordering a part.
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.