Named solely after the 2SA1359 part number, this 179 KB PDF is best treated as a component datasheet even though it is indexed under schematics. JIS numbering uses 2SA for high-frequency PNP transistors. The document is useful for checking pin order and package outline, reading absolute maximum ratings and confirming gain grading when measuring a suspect transistor with a meter. Body markings normally drop the leading 2S, so look for A1359 on the case when identifying the device.
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.