Datasheet-type PDF, 195 KB, for the transistor 2SA1971, whose 2SA prefix marks a PNP bipolar device under the Japanese JIS scheme. It sits in the schematic category, but the name refers only to the component and gives no further details. Open it to confirm pin order, collector-emitter voltage and current limits and gain figures, then check the marking and package on the board so that a replacement or cross-reference part fits and performs within the same ratings.
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.