The 2SB1457 is covered by this 192 KB PDF, the largest of the group, filed as a schematic but named like a standard component datasheet. In the JIS system, 2SB identifies a PNP transistor intended for low-frequency applications such as audio output and power control. The file size points to extensive characteristic curves. Consult it to check pin assignment, safe operating area and thermal limits, and compare package and ratings when choosing a substitute for a damaged transistor.
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.