At 320 KB, this PDF for the 2SA1163 is the largest of this group of 2SA files and likely a full manufacturer datasheet with characteristic curves. The 2SA prefix places it in the JIS PNP bipolar transistor series, and nothing in the name links it to a specific device despite the schematic label. It is useful for checking pinout, package outline, maximum ratings and hFE classes during fault finding and part substitution. The body marking on small packages is usually abbreviated, so compare package codes.
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.