The 2SC4690 is the subject of this 175 KB PDF, which the index files as a schematic even though the name points to a single transistor document. In Japanese JIS designations the 2SC prefix signifies an NPN bipolar transistor. Expect information such as pin layout, package dimensions and maximum voltage, current and dissipation figures. Repair use is straightforward: identify base, collector and emitter, test the device out of circuit, and choose an equivalent with equal or better ratings after verifying the marking on the board.
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.