Insert the USB drive into the USB port on the front panel of the receiver. button on your remote. Navigate to Update Start
Once you have obtained the firmware file from Denon Support, follow these steps to install it: Denon Avr-x520bt Firmware Download
: Once finished, "Completed" will appear, and the unit will automatically restart. Troubleshooting & Support AVR-X520BT - Denon Insert the USB drive into the USB port
The Denon AVR-X520BT was discontinued several years ago. However, updating remains advisable for legacy users. "Completed" will appear
To update the firmware on your Denon AVR-X520BT , you must use a USB memory device