A 130 KB PDF named for the 2SB1188, indexed as a schematic but by its name a single-transistor data sheet. In JIS naming, 2SB indicates a PNP transistor of the low-frequency class. The name gives no manufacturer, package or revision. The size suggests several pages with tables, curves and outline drawings. Use it to confirm base, collector and emitter positions, check voltage and current limits before substitution, and match the package. Confirm the board part is really marked as this number.
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.