Indexed as a schematic, this 16.7 KB PDF is named after the JEDEC part number 1N6774 and is most likely a short component datasheet. The 1N prefix designates a single-junction device, but the name gives no further detail, so read the document to confirm the exact type and ratings. Technicians use such sheets to decode the marking on a failed part, check voltage and current limits and find a cross-reference. Match package, polarity and ratings before soldering in any substitute component.
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.