A 463 KB PDF for the 2SC380TM, an NPN transistor numbered under the JIS 2SC scheme; TM is part of the name but its meaning is not explained. Catalogued as a schematic, it likely contains the component datasheet with no further maker detail in the name. Technicians consult it for the lead order, ratings and gain groups when testing or replacing the part in older radio circuits. Make sure the marking and package of the removed device agree with this document before soldering in a substitute.
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.