Reference sheet for the 2SC5784 transistor, a 178 KB PDF listed under schematics. Under Japanese JIS numbering a 2SC code denotes an NPN bipolar transistor intended mainly for high-frequency use, so expect a datasheet rather than a circuit diagram. Use it to read the base, collector and emitter layout of the package and the absolute maximum ratings when hunting a substitute for a failed device. The name gives no manufacturer or revision, so compare the body marking and package with the drawing before relying on it.
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.