An 89.5 KB PDF describing the 2SB1396, a JIS-registered part; the file name gives no further specifics. The 2SB designation marks PNP bipolar transistors for low-frequency service. A technician turns to a sheet like this when a transistor has failed short or open and a replacement must be chosen: the pinout, case style, voltage limits, collector current and power rating all need to line up. Keep in mind that the 2S prefix is usually missing from the printed marking on the component body.
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.