PDF documentation for the 2SA1124, a JIS-numbered PNP bipolar transistor, with an _E suffix in the name and a size of 40.4 KB. Although indexed as a schematic, the content is expected to be a part datasheet with electrical characteristics and package dimensions. Before swapping a suspect transistor, use it to confirm the lead arrangement and ratings, since parts in similar packages often use different pin orders. Checking hFE grade letters on the original part also helps pick an equivalent.
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.