Covering the 2SA1422 transistor, this PDF weighs 91.8 KB, close to the 2SA1423 file, which suggests a similar document format. The 2SA prefix follows the Japanese JIS scheme for PNP devices. No package, maker or revision appears in the name. Typical uses include checking the pin assignment, reading maximum ratings and comparing hFE classes when a stage misbehaves. Before installing a replacement, match the outline and lead order shown in the drawing to the PCB footprint.
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.