: Plug the USB drive into the receiver's USB port.
Onkyo strongly recommended performing the update via for the NR646 in 2021, as the over-the-network (internet) update servers for this legacy model were becoming unreliable.
As documented on AVS Forum and Reddit’s r/hometheater:
: Press SETUP on the front panel, go to 8. Misc > 8.1 F/W Update , and scroll to find the Version number. The Target : Your version should be 1110-6060-1106 .
The 2021 firmware refined the HDCP (High-bandwidth Digital Content Protection) keys and improved the EDID (Extended Display Identification Data) management. While no firmware could physically upgrade the HDMI chips to 2.1 standards, the update optimized the signal processing algorithms. This resulted in greater stability for 4K HDR content, ensuring that the receiver remained a viable hub for modern home theaters rather than a bottleneck that required users to plug devices directly into their TVs.
For a more reliable installation, especially if your Wi-Fi is unstable, use a USB flash drive .
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: Plug the USB drive into the receiver's USB port.
Onkyo strongly recommended performing the update via for the NR646 in 2021, as the over-the-network (internet) update servers for this legacy model were becoming unreliable.
As documented on AVS Forum and Reddit’s r/hometheater:
: Press SETUP on the front panel, go to 8. Misc > 8.1 F/W Update , and scroll to find the Version number. The Target : Your version should be 1110-6060-1106 .
The 2021 firmware refined the HDCP (High-bandwidth Digital Content Protection) keys and improved the EDID (Extended Display Identification Data) management. While no firmware could physically upgrade the HDMI chips to 2.1 standards, the update optimized the signal processing algorithms. This resulted in greater stability for 4K HDR content, ensuring that the receiver remained a viable hub for modern home theaters rather than a bottleneck that required users to plug devices directly into their TVs.
For a more reliable installation, especially if your Wi-Fi is unstable, use a USB flash drive .
