Part reference for the 2SA1291 in PDF form, 40.8 KB. Filed as a schematic, but the name holds nothing other than a component code, and 2SA under the Japanese JIS scheme means a PNP transistor, so it is best treated as a datasheet. Expect a brief summary of package, pinout, absolute maximum ratings and hFE ranges. Repair work benefits from it when verifying a replacement, measuring junctions out of circuit, or confirming which terminal ties to the supply rail on a board being traced.
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.