While there was no new firmware released specifically in 2021, the final firmware for the Onkyo TX-NR646
(version 1110-6060-1106) was released in December 2020. This update remains the latest version for the receiver and addresses minor bugs while improving overall stability. Pre-Update Checklist
To ensure the update completes successfully, you must perform these steps before starting: Disable HDMI Control: Set "HDMI CEC" (RIHD) to Off. Disable Multi-Zone: Turn off Zone 2.
Stop Playback: Ensure all internet radio, USB, or server content is stopped.
Disconnect Peripheral Control: Turn off any control devices (like a PC) connected via Ethernet. Update Method 1: Via Network (Recommended)
This is the simplest method if your receiver is connected to the internet. Open Setup: Press the [SETTING/GEAR] button on your remote.
Navigate to Update: Go to 7. Miscellaneous (or 8. Misc depending on your current version) → Firmware Update. Select Network: Choose Update via NET and press ENTER.
Note: If the option is grayed out, wait a few minutes for the unit to fully initialize..
Start Update: Select Update and press ENTER. The process takes roughly 20–30 minutes.
Completion: When "Completed!" appears on the front panel, press ON/STANDBY on the main unit to enter standby mode. Method 2: Via USB Drive
Use this method if your receiver has network issues or if you prefer a manual install.
Prepare Drive: Download the zipped firmware from the Onkyo Support Site.
Format and Copy: Unzip the files and copy them to the root folder of a USB stick (do not put them in a subfolder).
Insert Drive: Plug the USB drive into the receiver's USB port. txnr646 firmware update 2021
Run Update: Navigate to 7. Miscellaneous → Firmware Update → Update via USB.
Start and Finish: Press ENTER to start. Once "Completed!" is displayed, remove the USB drive and power the unit off and on. Troubleshooting Tips
Failed Update (Error 1-83): If the update stalls, try unplugging all HDMI video sources and restarting the process. Users have found success after removing these cables during the update.
"No Update" Message: If you see this immediately, your receiver is already running the latest 2020 firmware.
Verify Version: After updating, check your version by going to Misc → F/W Update and scrolling down to the version number. Firmware Update TX-NR646 & TX-NR747 (12-01-2020) - Onkyo
The Onkyo TX-NR646's latest firmware update for the 2021 period was version 1110-6060-1106, released on December 1, 2020, to improve web setup and fix Sirius XM issues. While no new updates were released in 2021, this version remains the standard for maintaining stability, with updates installable via network or USB. For the official update documentation, visit Firmware Updates | ONKYO Asia and Oceania Website
Onkyo TX-NR646 Go to product viewer dialog for this item. reached its end-of-life for major firmware support in late 2020. The most recent and likely final official update for this model was released on 2 December 2020 (version 1.15). While no new updates were specifically issued in 2021, many users sought this final version during that year to address ongoing stability issues or to ensure compatibility with streaming services like Sirius XM. Latest Firmware Details (December 2020) The final official release for the
is version 1110-6060-1106 (or version 1.15). This update specifically aimed to:
Fix Web Setup Issues: Resolved a bug where customer settings could not be changed via the web setup menu.
Sirius XM Support: Fixed an issue where song information for Sirius XM radio was not displayed correctly.
General Stability: Included cumulative minor bug fixes from previous years, such as improvements to DTS:X compatibility and Dolby Digital Plus playback. How to Update Your
You can update your receiver using two methods. If the "Update via NET" option is greyed out, it typically means your unit is already up to date or has a network connectivity issue. Method 1: Network Update (Wi-Fi or Ethernet)
Connect your receiver to your home network via an Ethernet cable or Wi-Fi. Press Setup on the front panel or the remote. While there was no new firmware released specifically
Navigate to 8. Misc (or 7. Miscellaneous depending on menu version) → Firmware Update. Select Update Via NET and press Enter.
Wait for the message "Completed!" to appear. The unit will automatically enter standby mode after approximately 3 minutes. Method 2: USB Update (Recommended for Stability)
For a more reliable installation, especially if your Wi-Fi is unstable, use a USB flash drive.
Prepare the Drive: Format a USB drive (at least 128 MB) to the FAT file system.
Download & Extract: Download the firmware zip file from the Onkyo Product Support page. Unzip it and copy the contents directly to the root folder of the USB drive. Install: Plug the drive into the receiver's USB port.
Navigate: Go to Setup → Misc → Firmware Update → Update via USB.
Confirm: Select Update and press Enter. Do not turn off the power until the front display reads "Completed!". Common Troubleshooting in 2021 and Beyond Firmware Update TX-NR646 & TX-NR747 (12-01-2020) - Onkyo
The "Great Update of 2021" for the Onkyo TX-NR646 wasn't just a routine patch; for home theater enthusiasts, it was a long-awaited digital revival. The story follows
, an audiophile whose trusty TX-NR646 had begun to feel like a relic of a bygone era. For months, his unit had struggled with intermittent connection drops and the occasional "handshake" issue with his newer 4K devices. He spent his evenings scouring forums like Onkyo Support Page , waiting for a sign of life from the manufacturer.
Then, in late 2021, the notification finally appeared. The firmware update promised more than just stability; it was a performance tune-up for a classic workhorse. The Digital Transformation
: Leo cleared his afternoon, knowing that a botched firmware update could turn his beloved receiver into a very expensive paperweight. He bypassed the flaky Wi-Fi and plugged in a dedicated Ethernet cable for maximum stability. The Progress Bar
: As the "Updating..." text blinked on the front panel, Leo watched with bated breath. This specific 2021 update was designed to improve Chromecast Built-in
performance and resolve minor bugs that had plagued the DTS:X and Dolby Atmos processing during high-bitrate playback. The Payoff Method 2: USB Update (Safest for Unstable Network)
: Once the "Complete" message scrolled across the display, the transformation was immediate. The Spotify Connect lag vanished, and his 4K Blu-ray player finally synced with the receiver in seconds rather than minutes.
The 2021 update proved that even as newer models hit the shelves, the TX-NR646 still had plenty of heart left. For Leo, it wasn't just about the software—it was about keeping the music playing for another year. official changelog for this particular firmware version?
The most recent official firmware update released specifically for the Onkyo TX-NR646 was issued on December 1, 2020 (Firmware Version: 1110-6060-1106
). While no new updates were released in 2021 specifically for this model, many users sought this late 2020 update throughout 2021 to resolve persistent bugs. Update Highlights (Version 1110-6060-1106) Web Setup Fix
: Resolved an issue where users were unable to change customer settings within the web-based setup menu. Sirius XM Support
: Fixed a bug that prevented song information from displaying correctly during Sirius XM radio playback. Stability & Compatibility
: Included cumulative improvements for DTS:X compatibility and general system stability. Key Considerations & Issues 4K HDR Limitations
: Some users reported that after installing recent firmware, the previous "secret" key combination (BD/DVD + Power) to enable HDMI 4K Enhanced
mode no longer worked, potentially affecting 4K HDR passthrough for certain devices. Update Failures : A common issue during the update process is the Error 0-21 , which typically indicates a network failure. strongly recommends using a USB flash drive
for a more reliable installation rather than a wireless connection. Hardware Vulnerability
: Older units may experience "DSP" update hangs (e.g., stopping at 70% or 90%), which can sometimes indicate a failing internal memory chip rather than a software bug. How to Update
This is the preferred method if your TX-NR646 has never been updated or if the network update fails.
ONKYO_TXNR646_21110.zip or a .bin file) to the USB root.ONKUP (exact capitalization).Cause: Corrupt download or USB drive not FAT32.
Fix: Reformat USB, re-download firmware from Onkyo, and retry.
By 2021, the TX-NR646 was no longer receiving new features (like HDR10+ or VRR, which the hardware doesn't support). However, this update focused on system stability and network security.