PDF data for the 2SA1838, sized 87.4 KB and stored in the schematic category of the index. The part number follows the Japanese JIS system, in which 2SA stands for a PNP bipolar transistor. The document should list ratings, characteristic curves and mechanical dimensions. Before relying on it, match the marking on the physical component to the part number, then use the pin diagram to orient the replacement correctly, since a reversed transistor can damage the surrounding circuit.
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.