PDF listed as a schematic, but the Persian title refers to a book about the miracle of gratitude by Rhonda Byrne, so it is very likely not a repair document at all. No device, brand or board number appears in the name, and the 2.52 MB size fits an ordinary text document. Open it to check before relying on it for any repair work. Genuine schematics normally carry a model or board code, and you should always confirm that code matches the PCB you are working on.
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 @schematic_mobile5. 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.