A compact 49.9 KB PDF for the 2SD2074, with an _E suffix in the name that is not explained and could indicate a language edition or document revision. The 2SD prefix under the JIS scheme designates an NPN bipolar transistor for low-frequency circuits. Though filed under schematics, its likely content is a datasheet with ratings, characteristics and package outline. Use it to confirm terminal layout and limits before fitting a replacement, and match the part marking on the board to this number.
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.