Catalogued as a schematic, this 130 KB PDF is titled with the part number 2N6800 and nothing else. No equipment model or board revision is given. Under the JEDEC system a 2N number identifies a discrete semiconductor, so the pages likely hold a datasheet with ratings, characteristic curves and a mechanical outline. It is useful when testing a suspect device with a meter, confirming pin assignment, or choosing a replacement whose voltage and current ratings are no lower than the original.
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.