Listed under schematics, this 116 KB PDF is named 85hf and says nothing about brand, board or revision. The code may correspond to a rectifier diode series, but only the document can confirm what it describes, so check its header. Sheets like this typically present voltage classes, current ratings, surge capability and stud or package dimensions. They help when identifying a failed power diode and choosing a replacement with the correct voltage class and polarity; verify the full marking on the original part first.
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.