The 2SA1430 transistor is covered by this 182 KB PDF, the same size as its 2SA1431 neighbour, which suggests a shared document layout. In Japanese JIS numbering a 2SA prefix marks a PNP device. No revision or package code appears in the name. Expect pin configuration, absolute maximum ratings and gain figures, which help when testing junctions with a multimeter or planning a replacement. Confirm the body marking and footprint before soldering in any substitute, since the lead order can differ between packages.
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.