Datasheet for the 2SB1612, delivered as a 39.6 KB PDF whose _E suffix probably marks the English-language edition. The 2SB prefix under JIS rules signifies a PNP low-frequency bipolar transistor; maker and package are not named. For repair use, the key sections are the absolute maximum ratings, electrical characteristics and package drawing with pin numbering. Read the device marking on the PCB and compare it to the code in the sheet before replacement, and match gain class where the circuit is sensitive to 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.