Part documentation for the 2SA1697 transistor, supplied as a 109 KB PDF and indexed as a schematic, although its naming matches a typical datasheet. JIS codes beginning with 2SA describe PNP transistors intended for high-frequency service. No manufacturer or revision is given in the name. Use the document to identify terminals, look up breakdown voltages and gain groups, and decide whether an alternative part can stand in; double-check the printed marking on the board component first.
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.