This 216 KB PDF documents the 2SC5463, a 2SC-series part, which under Japanese JIS designation is an NPN bipolar transistor. Filed as a schematic, it is more likely a detailed datasheet with curves and mechanical drawings. Look in it for maximum collector-emitter voltage, collector current, power dissipation and pin layout. It supports choosing an equivalent after a failure, but confirm the marking on the component and match the package so the replacement fits the PCB footprint.
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.