Small 37.0 KB PDF for the 2SB1427 transistor; the name gives only the part number, with no maker or revision. In JIS designations, 2SB marks a PNP low-frequency bipolar transistor, the kind often found in power switching and audio stages. A repair tech would consult it to identify the base, collector and emitter leads, to read the collector current and voltage ratings, and to judge whether a cross-reference part is a safe swap. Read the body marking carefully, since manufacturers often print it with the 2S prefix dropped.
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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