PDF datasheet for the 2SD1133, 43.0 KB, listed among schematics though its name refers only to the part. In the Japanese JIS scheme, 2SD marks an NPN bipolar transistor intended for low-frequency circuits. Look here for absolute maximum ratings, gain grades and the outline drawing showing which lead is collector, base and emitter. Verify these against the PCB footprint before fitting a new part, because a reversed pinout can damage the replacement and nearby components.
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.
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