Datasheet for the 2SA1013 transistor, a 209 KB PDF filed under schematics in this index. Japanese JIS numbering assigns the 2SA prefix to PNP bipolar transistors. The document should include absolute maximum ratings, electrical characteristics, typical graphs and a package drawing with pin identification. It supports fault finding by letting you test junctions correctly and judge whether a replacement has sufficient voltage and current capability. Verify the package and manufacturer marking on the board before trusting the pinout.
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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The standard format for schematics, block diagrams, power-sequence charts and service manuals.