Named 2N6788 and stored as a 132 KB PDF, this entry is classed as a schematic but reflects a JEDEC discrete device code. No equipment, brand or board number accompanies it. It most likely contains datasheet information: ratings, characteristics and a case outline. When a component of this type is suspected shorted or open, the sheet helps identify terminals for meter tests and sets the specifications a replacement must meet. Verify markings before trusting the match.
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.