PDF of 90.6 KB for the 2SB1131, listed in the schematic category though the name is simply a component number. Following the Japanese JIS convention, 2SB means a PNP transistor aimed at low-frequency applications such as switching, regulation and audio. Use the document to look up base, collector and emitter positions, saturation voltage, current gain and power limits. When sourcing a replacement, match polarity and package first, then compare ratings, and confirm the marking on the original part 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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.