A 178 KB PDF containing the datasheet for the 2SA966 transistor, indexed with schematics. The JIS 2SA designation means the part is a PNP bipolar transistor. The sheet should present absolute maximum ratings, electrical characteristics, gain groups and a mechanical drawing that shows which lead is emitter, base and collector. Repair technicians use it for correct in-circuit and bench testing and when choosing a replacement with adequate ratings. Check the body marking on the board matches before substituting.
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.