A compact 44.3 KB PDF describing the 2SD602 transistor, indexed as a schematic though its content is component data. An _E suffix appears in the name as an edition tag. The JIS 2SD prefix stands for an NPN low-frequency bipolar transistor, and the part body may only read D602. Before swapping it, compare the ratings, gain rank letter and package outline with the original, and use a meter in diode mode to confirm the junctions of the removed part are actually damaged.
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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