Named 5EQ100 and catalogued as a schematic, this 74.2 KB PDF gives no device model, board number or revision. The code looks like a component part number, so the file is probably a single-part reference with ratings and a package drawing rather than a board diagram, though the name alone cannot confirm the exact part type. Any PDF viewer opens it. Identify the part from the first page, then compare its marking and outline with the component under test before using the stated values.
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.