The 2SD2252 is the subject of this 88.6 KB PDF, indexed as a schematic but best treated as a transistor datasheet. No board, device or revision is named, only the part type. In JIS terms 2SD marks an NPN low-frequency bipolar transistor, and markings on the component frequently drop the 2S, reading just D2252. Use the document to verify the collector-emitter rating, current capability and pin assignment, and measure the suspect part out of circuit before condemning it.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.