Datasheet in PDF format, 88.0 KB, for the 2SA1656; the file name states nothing else about the device. According to the JIS designation system, 2SA parts are PNP bipolar transistors of the high-frequency class. Technicians use such a reference when replacing a damaged transistor: confirm the pinout and package, compare voltage and current ratings, and check gain grouping on the candidate substitute. The 2S prefix is normally left off the body marking, so look for A1656.
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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