The 2SB1375 transistor is covered by this 182 KB PDF, indexed among schematics but functioning as a part datasheet. The name holds just the part number. A 2SB code under JIS denotes a PNP transistor for low-frequency service, frequently found in power and output stages. Use the sheet to verify lead arrangement and package, check breakdown voltage, collector current and dissipation, and judge an equivalent before soldering. Confirm the marking on the original component, often printed as B1375.
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.