Schematic PDF titled C6 2020, with no brand or board number given in the file name, so the exact device has to be confirmed from the title block inside the document. At 23.3 MB it is probably a complete multi-page circuit diagram. Repair work with a schematic usually means following supply rails, finding the source of a short, and checking signal paths between the main ICs. Before relying on it, compare the project name and revision printed in the drawing against the markings on the board you are repairing.
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 @smart_repair_phone. 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.