Reference PDF for the 2N5088, 282 KB, with an RE suffix in the name whose meaning is not stated and may mark a revised or alternate edition of the document. Although indexed as a schematic, a part-number-only file like this is normally a component datasheet. Use it to look up the lead configuration, ratings and characteristic curves when diagnosing or replacing the device. Compare it with other editions of the same sheet if figures differ, and confirm the package outline matches your part.
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.