The 2SB1344 transistor is the subject of this 38.9 KB PDF, which the index lists under schematics. Japanese JIS part numbers prefixed 2SB denote PNP bipolar transistors for low-frequency applications. Neither maker nor revision appears in the name. Technicians rely on such a sheet to identify pins before in-circuit testing, to read the voltage, current and power limits, and to verify that any replacement shares the footprint so it fits the existing pads without bodging.
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.