Denon AVR-1911 Service Manual page 25

7. Complete the firmware updating
(1) Click the "Update" button.
(2) When writing of the firmware is completed, the power of this unit turns on automatically and you can see the "Update
completed" message.
(3) If you can't complete the firmware update, please retry the firmware update from "3. Turn on the AV receiver/
amplifier".
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