A PDF of 129 KB indexed as a schematic, though the name 6CWQ03FN reads like a discrete semiconductor part number rather than a board number, so it is most likely a component datasheet. The 6CWQ prefix is used for dual Schottky rectifiers in surface-mount packages. A technician would open it in any PDF reader to check pinout, forward voltage, reverse rating and package outline before choosing a replacement. Confirm the full marking on the part matches, including suffix letters.
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.