A 104 KB PDF dedicated to the 2SK1424, an N-channel field-effect transistor going by its JIS 2SK prefix. It is listed under schematics, yet a part-number name points to a datasheet. The name carries no package, manufacturer or specification details. Repair use is straightforward: confirm pinout before measuring, check that drain-source readings make sense, and match voltage, current and on-resistance when hunting for an equivalent part, after verifying the marking on the original device.
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.