Android APK for Dangbei Desktop, a launcher widely used on Android TV boxes and smart TVs, here version 4.1.7 in a slimmed-down lite build according to the Chinese title. It replaces the default home screen with a TV-oriented interface. Installation is done by sideloading the APK via USB storage or ADB with unknown sources enabled. It is software rather than repair documentation, but useful when restoring a usable interface on a reflashed or reset TV box. Confirm compatibility with the device before setting it as default launcher.
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 @tv_software. Enginerys does not host this file.