A compact 55.5 KB PDF covering the 2SD1304, catalogued as a schematic even though the 2SD number indicates a discrete NPN transistor under JIS numbering. The _E suffix in the name is not explained, so the file contents should confirm what it denotes. Datasheets of this kind give breakdown voltages, current and power limits, hFE ranks and lead identification. Check the pin sequence against the actual package before fitting a replacement, because base, collector and emitter order varies between case styles.
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.