Stored as a 190 KB PDF, this document is named after the 2SD1936, a JIS-registered NPN transistor. Although classified as a schematic, a part number like this normally indicates a manufacturer datasheet with electrical characteristics, graphs and package dimensions. It helps when a transistor in a power supply, amplifier or motor driver stage must be identified or replaced. Pin assignment varies between package styles, so check the drawing against the footprint on the PCB. No board, device or revision is mentioned in the name.
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.