PDF document for the 2SB1185 transistor, filed under schematics and 133 KB in size. The trailing 1-5 in the name is not explained; it may refer to pages or a document revision, so check the content. Under the Japanese JIS scheme the 2SB prefix marks a PNP transistor intended for low-frequency work such as audio stages, drivers and power switching. Technicians use such a sheet to confirm pinout, package, maximum ratings and gain before fitting a replacement, and to compare the body marking with the part being replaced.
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.