Schematic in a 59.3 MB PDF whose name is just a number, so the model, board number and revision cannot be read from it. The size suggests a comprehensive drawing, possibly part of a numbered series alongside similarly named files. Use a PDF reader with text search to find net names and part designators while tracing rails, enable signals and faults. Check the title block for the board identity and confirm it matches the PCB under repair before relying on any 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 @mobile_jump2. 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.