Specification PDF for the 2SA1706 transistor, 140 KB, catalogued under schematics despite naming only a part. The JIS designation 2SA denotes a PNP bipolar transistor, so expect maximum ratings, electrical characteristics and a package outline. No board or device appears in the name. The sheet is useful for confirming base, collector and emitter positions, reading allowable voltage and current before choosing a substitute, and checking whether the hFE grade printed on the original part matters for the circuit you are repairing.
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.