A schematic diagram (board 17839-1M). Shared as “LV315GM_MB 17839-1M BoardView PDF.pdf” — a .pdf file, 361 KB.
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 @ShareMan_Electronic_Files. 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.