Small 35.7 KB PDF for the 2SB1073; the _E suffix in the name is not explained and may mark a language edition or document version. Per JIS numbering, 2SB denotes a low-frequency PNP bipolar transistor. The file sits in the schematic category but is component reference material, useful for confirming pinout, package and limits such as collector-emitter voltage, collector current and power dissipation. Check the part marking on the board and the pad layout before fitting any substitute.
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.