An 80.4 KB PDF covering the 2sb1260 transistor, listed in the index under schematics. No maker, package or device model is given in the name. In the JIS system, 2SB identifies a PNP bipolar transistor of the low-frequency class. The sheet likely contains maximum ratings, gain groups, safe operating data and a dimensioned outline. Technicians rely on such sheets to check pinout and to ensure a substitute can tolerate the circuit voltage, current and heat. Compare the marking on the failed part with the sheet before ordering.
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.