Largest of this group at 382 KB, this PDF documents the 2SK1930, an N-channel field-effect transistor under Japanese JIS numbering. It is filed as a schematic but functions as a part datasheet with ratings, characteristic graphs and package drawings. Use it when replacing a shorted FET to confirm pinout and to ensure any substitute meets the voltage, current and power limits. The name reveals nothing beyond the part number, so verify the device marking and suffix before ordering.
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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