Datasheet-style document for the 3SK302, a 26.0 KB PDF indexed as a schematic. The 3SK prefix in Japanese JIS numbering denotes a four-terminal N-channel field-effect transistor, usually a dual-gate MOSFET for RF stages. When an RF amplifier in a receiver or tuner loses gain, a repairer can use this sheet for pinout, bias conditions and absolute maximum ratings. Surface-mount versions often carry a brief marking code, so confirm identity against the document before replacement.
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.