Part datasheet for the 2SC5589 in PDF, 298 KB, grouped with schematics in this index. The file name states only the part number. Japanese JIS designations with the 2SC prefix describe NPN transistors in the high-frequency class. A technician reads it to get the pinout, package drawing, maximum voltage, current and power ratings, and gain figures. Before replacing a suspected faulty device, test its junctions with a meter, confirm the C5589 marking and compare any substitute against the ratings listed here.
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.