PDF documentation, 42.4 KB, for the 2SD1010 part, with an unexplained _E suffix in its name. Though filed as a schematic, the 2SD prefix in Japanese JIS numbering identifies an NPN bipolar transistor meant for low-frequency use. The sheet serves for confirming lead assignment, maximum collector-emitter voltage, collector current and dissipation. Check the part marking on the board first, then use these limits to choose an equivalent that will survive the circuit's real operating conditions.
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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