Minor bug fixes, improvements to stability, and fixes for playback of specific audio content. How to Check Your Current Version To verify if your unit is running the final version: on the front panel. Navigate to and press Enter. 8.1 F/W Update Scroll to the Firmware Version
The Onkyo TX-NR646 remains a workhorse in the home theater world. Launched with robust support for DTS:X and Dolby Atmos, this 7.2-channel network receiver has stayed relevant through consistent software support.
If the receiver is acting sluggish after a long period of use, perform a factory reset. Note: This clears all Audyssey calibrations. txnr646 firmware update 2021
That said, if you're looking to install the final update, this guide will walk you through the process using the USB method.
If your display reads , your receiver is fully up to date and no further action is required. Preparation and Safety Precautions Firmware Update TX-NR646 & TX-NR747 (12-01-2020) - Onkyo Minor bug fixes, improvements to stability, and fixes
Plug the USB drive into the front or rear USB port of the receiver.
As Ryan sipped his coffee, he received an email from his team lead, Mark. The subject line read: "txnr646 Firmware Update 2021 - Let's Get Ready." Ryan's heart skipped a beat as he opened the email. It was finally time to push the firmware update to production. Note: This clears all Audyssey calibrations
: Fixed a bug that prevented song information from displaying correctly during Sirius XM radio playback. Stability & Compatibility
The email outlined the plan for the day: a thorough review of the update, a final test, and then deployment. Ryan felt a mix of excitement and nerves. This update was a major milestone, and he was eager to see the txnr646 firmware in action.
According to Onkyo’s official release notes (archived from their Japanese and US support pages), the February 2021 update addressed the following: