Transistor datasheet for the 2SC5200 in a 172 KB PDF, listed under schematics but named only by part number. In the JIS system the 2SC prefix signifies an NPN transistor for high-frequency applications. The sheet should contain pin identification, maximum ratings, safe operating information and package outline. These details matter when testing a suspected failed output or driver device and when sourcing a replacement; check the exact marking, because counterfeit or relabeled parts of popular numbers circulate.
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.