Brief 40.6 KB PDF for the 2SC4543, carrying an _E suffix whose meaning the name does not explain, and filed under schematics. The JIS 2SC prefix identifies an NPN bipolar transistor of the high-frequency class, so this is likely a compact datasheet. No maker or package is stated. Use it to verify the base, collector and emitter pins, check ratings and gain, and assess equivalents. Make sure the package and marking on the board agree with the document 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.