A 179 KB PDF for the 2SA1160, a PNP transistor from the JIS 2SA series. The name carries only the part number, so treat the document as the component datasheet rather than a board schematic, whatever the catalogue type says. Practical uses include confirming lead order before installing a replacement, reviewing collector-emitter breakdown and current ratings, and checking gain groupings. Make sure the package on the board matches the outline in the sheet, as one part number may come in more than one case.
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.