Catalogued as a schematic, this 41.7 KB PDF bears the part number 2SC5611 and should be the datasheet for that NPN bipolar transistor. The 2SC prefix follows JIS conventions for NPN devices of the high-frequency class. No maker or package is named. A short datasheet like this typically covers ratings, key electrical parameters and the outline, enough to identify the leads, check whether the part is shorted and choose a replacement. Cross-check the SMD marking or printed number on the actual part first.
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.