This 109 KB PDF, placed in the schematic category, is named for the 2N6388, a JEDEC-registered discrete semiconductor designation. The name carries no board, device or revision information, so treat the file as the part's datasheet, covering pin layout, case dimensions, ratings and characteristic graphs. It assists in confirming terminals before fitting a replacement, judging whether the part was overstressed, and finding substitutes. Verify the package and marking against the physical component before relying on it.
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.