PDF of 314 KB named 25GQ045. The title resembles a semiconductor part number, so this is most likely a datasheet for a single component even though the index files it as a schematic. No host device, board number or revision is mentioned. A document like this is useful for checking pinout, package and electrical ratings before replacing a failed part in a power or rectifier circuit. Any PDF reader will display it; make sure the marking on the actual part matches this code including any 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.