A 229 KB PDF filed as a schematic, though its name, 25RIA, reads like a semiconductor part number rather than a board number, so the content is most likely a component datasheet. The name carries no model, revision or board details beyond that code. Technicians normally open such a PDF in any reader to check pinout, package outline and absolute maximum ratings before substituting a part. Compare the marking on the actual component with the document and confirm the suffix letters match before trusting the figures.
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.