Single-part reference for the 2SC4864 in a 118 KB PDF, catalogued as a schematic. Apart from the part number, the name gives no information. The 2SC prefix is the JIS/JEITA designation for NPN bipolar transistors, which makes this a datasheet rather than a board diagram. It typically supplies voltage and current limits, hFE classes and the case outline. Before replacing a shorted or open transistor, check the pin order and package here and choose a substitute with ratings no lower than the original.
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.