Denon Avr-x520bt Firmware Update Site

The update process will begin. The front panel display will show progress indicators (such as percentages or specific file loading stages). Important Safety Warning During the Update to the receiver. Do not unplug the USB drive during the process. Do not press any buttons on the remote or the front panel.

Press and hold the button and TUNER PRESET CH – button at the same time. Denon Avr-x520bt Firmware Update