Here is a 37.0 KB PDF for the 2SD1030, named with an _E suffix that is not explained in the file name. Despite the schematic label, the 2SD prefix under JIS conventions indicates an NPN low-frequency transistor, so the content is a part specification. Use it to confirm package outline and terminal order, read voltage, current and power ratings, and judge whether an alternative transistor is a safe swap. Always compare with the marking on the physical component before substituting.
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.