Short PDF of 43.2 KB for the 2SD1149, with an _E suffix after the part number that the name leaves unexplained. It is indexed as a schematic but reads as a datasheet. Japanese JIS numbering reserves 2SD for NPN bipolar transistors in low-frequency applications. A compact sheet like this typically gives ratings, key characteristics and the case outline. That is enough to confirm pin order and choose a replacement with equal or better voltage, current and dissipation figures.
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.