The name of this 237 KB PDF is just the number 2416, and it is filed as a schematic without any brand, model or revision. Little can be inferred from the name, so open it and check the heading to learn which component or circuit it documents. Short numeric titles like this usually indicate a single-part datasheet with pinout, electrical ratings and example circuits. Use it to verify pin functions and voltages on the board, and make sure the full part marking on the chip matches the document.
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.