Compact 41.4 KB PDF for the 2SB987, with an _E suffix not explained by the name, perhaps an edition or language marker. Under JIS numbering, 2SB indicates a PNP transistor intended for low-frequency circuits like drivers, regulators and audio amplifiers. Although catalogued as a schematic, it serves as the component datasheet, giving pin order, package and ratings. Check the device marking and board footprint match the document before using its data to test or replace the transistor.
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.