The 2SC4249 transistor is the subject of this 263 KB PDF, filed under schematics. The name carries the part number alone, so maker and revision are not stated. JIS part numbers with the 2SC prefix denote NPN transistors of the high-frequency class. Repairers use these sheets to confirm base, collector and emitter pins, check voltage, current and power ceilings and assess cross-reference candidates. Look for the C4249 marking on the case and verify the package outline before fitting an alternative part.
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.