Reference PDF covering the 2SB1530 transistor, filed under schematics but in practice a component datasheet identified only by its JIS part code. The 2SB prefix marks a PNP device classed for low-frequency use such as audio stages, regulators and switching. Nothing else in the name adds revision or maker details. Before swapping the part, read the pin assignment against the package drawing, since base, collector and emitter order varies between packages, and confirm the voltage and power ratings match the circuit.
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.