For the 2SA1783 transistor, a 186 KB PDF sits in the schematic category, though the JIS designation makes it a part datasheet rather than a circuit diagram. The 2SA prefix denotes a PNP bipolar transistor; the name carries no manufacturer, revision or package detail. Pull it up when you need ratings, the hFE classification table or the pin layout, for example while testing a suspect transistor out of circuit or picking an equivalent. Open it in any PDF reader.
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.