Archive for an R4 HD satellite receiver, apparently software build 479 dated 12 December 2013, with a leading catalogue number 73689 in the name. The RAR is about 1.95 MB and likely holds the update image for the box. It is useful when a receiver needs reflashing after corruption or a return to a specific software level. Since R4 HD style names cover several clones, check the main board and processor against the firmware source, and back up the current flash content before writing the new image.
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 @tvsoftwareworld. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.