Labelled 2SD2526, this 192 KB PDF contains reference data for a Japanese-coded transistor rather than a device-level circuit. Under JIS numbering, 2SD marks an NPN bipolar transistor meant for low-frequency use, common in power and driver sections. Read it for the base, collector and emitter positions, breakdown voltages, current limits and package style. When the original is damaged, these figures let you judge a substitute. Body markings usually omit the 2S, so look for D2526 on the part.
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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