A 144 KB PDF for the 2SA1317 transistor, listed under schematics but almost certainly a part datasheet given that the name is just the component code. The JIS 2SA prefix identifies a PNP bipolar device. Use it to confirm which leg is emitter, base and collector, compare absolute maximum ratings and hFE grades, and judge whether a proposed equivalent is safe. No manufacturer or document revision appears in the name, so compare the package marking on the part against the drawing 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.