Datasheet for the 2SA1811 in PDF format, 173 KB in size, filed alongside schematics in the catalogue. The 2SA prefix under the Japanese JIS standard designates a PNP bipolar transistor. A document of this size usually includes characteristic graphs in addition to rating tables and the package outline. Use it to confirm pin functions, power dissipation and safe operating limits when diagnosing a failure or choosing a substitute. Verify the manufacturer and package against the part fitted on the board.
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.