Labelled 80EPS08, this 80.7 KB PDF is classed as a schematic but carries a semiconductor part code in International Rectifier style, so it most likely contains a rectifier diode datasheet. No device or board number is given. It is handy for checking package outline, pin arrangement and maximum ratings when testing a suspect diode in a power input or supply stage. A general 80EPS series sheet is also indexed; match the exact digits on the part to this document before ordering a replacement.
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.