The 2SD2225 transistor is described in this 44.3 KB PDF, listed as a schematic in the catalogue. The _E tag in the name refers to an edition of the document. JIS numbering uses the 2SD prefix for NPN bipolar transistors designed for low-frequency circuits. Open it in any PDF viewer to check lead arrangement, maximum ratings and electrical characteristics, then compare them with a candidate replacement and with the package footprint on the board being repaired.
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.