The 2N6768 PDF, 145 KB, appears in the schematic index but its title is purely a JEDEC discrete component code. It gives no model, brand or board number. Content should be datasheet material covering pin identification, absolute maximum ratings and package dimensions. Use it when testing a suspected failed device or when cross-referencing replacements, and make sure the substitute equals or exceeds the voltage, current and power ratings listed while sharing the same case style.
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.