With only the series code 80EPS, this 77.3 KB PDF probably covers a family of rectifier diodes rather than one grade, and despite the schematic label nothing points to a specific device or motherboard. The naming resembles International Rectifier part designations. Use it to compare grades, read the shared package drawing and pinout, and check limits before replacing a component. Identify the grade from the marking on the actual part, since the name does not state which one you need.
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.