The 2SC5230 is described in this 129 KB PDF, indexed as a schematic even though its name is a discrete part number. The 2SC prefix, under the JIS registration scheme, denotes an NPN bipolar transistor. The name gives no further variant information. A repair tech would use it to read maximum ratings and the pin layout, and to compare characteristics when a direct replacement is unavailable. Neighbouring numbers in this series are separate devices, so confirm the exact marking.
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.