PDF document for the 2SA1380, a part number that follows the Japanese JIS scheme, where the 2SA prefix marks a PNP transistor intended for high-frequency use. Although catalogued as a schematic, a 157 KB file named after a single component is most likely its datasheet. Use it to confirm pinout, package outline, maximum voltage and current ratings and the complementary part before fitting a substitute. Check the marking on the board, since the leading 2S is often left off the 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.