The 2SC5226 is covered by a 112 KB PDF that the index classes as a schematic, though the name indicates a component datasheet. The JIS EIAJ scheme marks 2SC parts as NPN bipolar transistors. The name gives no details beyond the number itself. Use it for pinout, maximum ratings, gain grouping and package dimensions when replacing or testing the device. Check the marking on the board first, because SMD transistors often carry short codes rather than the full part number.
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.