Datasheet in PDF for the 2SB1558 transistor, roughly 185 KB, listed under schematics. The 2SB designation follows the Japanese JIS standard for PNP low-frequency bipolar transistors; the name carries nothing about vendor or package. The document is handy when a driver or regulator stage fails: it lists breakdown voltages, collector current, power dissipation and characteristic curves, plus the mechanical drawing with pinout. Verify the part marking on the board and match package and ratings before installing any equivalent.
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.