The 2SA1518 is the subject of this 30.2 KB PDF, which the index files as a schematic although the name suggests a component data sheet. Under JIS rules 2SA means a PNP transistor. No maker, package or revision is given in the name. In repair, such a sheet is consulted to confirm terminal layout, check whether a substitute meets voltage, current and power limits, and understand gain grading letters. Open it with any PDF viewer and compare the package drawing with the part 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.