The 2SA1315 PNP transistor, per the Japanese JIS 2SA prefix, is the subject of this 220 KB PDF. It sits in the schematic category, yet a file titled only with a part number is usually the component datasheet. Open it in a PDF reader to look up pin configuration, case outline, breakdown voltages, collector current and gain grouping. Those figures matter when sourcing a replacement or cross-referencing an equivalent. The name states no manufacturer, date or revision, so treat the content as the authority.
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.