Indexed as a schematic, this 40.2 KB PDF is named 2SB1220 with an _E suffix and almost certainly contains the datasheet for that JIS transistor. A 2SB prefix identifies a PNP low-frequency type, commonly used in power, audio or regulator circuits. Use it to confirm which pin is collector before probing for shorts, read the current and dissipation limits, and compare specifications against a proposed equivalent. Open it in any PDF reader and check the case and marking on the actual component.
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.