PDF reference for the 2SA1682, a part number following the Japanese JIS scheme in which 2SA identifies a PNP bipolar transistor of the high-frequency class. It is catalogued as a schematic, but the name points to a single-component datasheet. Use it to check pin assignment and package before soldering, and to compare absolute maximum ratings when choosing a replacement. Confirm that the marking on the actual device matches, because similar codes can belong to different parts. The file is 70.7 KB.
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.