The base 2SA1832 transistor is documented in this 232 KB PDF, catalogued with schematics though it should be a component datasheet. The 2SA prefix follows the JIS standard for PNP bipolar transistors, and separate files in the index cover the F and FT suffixed variants. Consult it for collector-emitter voltage, current and dissipation limits, gain ranks and the package outline, then match the stamped marking on the board to ensure you are reading the correct variant.
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.