Txnr646 Firmware Update 2021 Updated ✔

The Onkyo TX-NR646 remains a highly capable 7.2-channel network A/V receiver, but keeping its software current is crucial for peak performance. The latest official firmware update for the Onkyo TX-NR646 was released in December 2020 (version 1.15). While no new updates were issued in 2021, many users sought out and installed this specific version throughout 2021 to address ongoing system bugs.

Do not touch the unit until the front display reads "Complete". The receiver will automatically shut off or prompt you to reboot. 🌐 Alternative: Update via Network txnr646 firmware update 2021

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. The Onkyo TX-NR646 remains a highly capable 7

1. Download the firmware from Onkyo’s official support site (search “TX-NR646 firmware 21110”).
2. Prepare a USB drive: FAT32 format, empty, 256MB to 2GB capacity (larger drives may not work).
3. Extract the ZIP file and copy the folder (containing ONKYO_TXNR646_21110.zip or a .bin file) to the USB root.
4. Rename the folder to ONKUP (exact capitalization).
5. Power off the TX-NR646. Insert the USB into the front panel port.
6. Hold down the USB button on the front panel, then press STANDBY/ON. Keep holding USB until “Starting...” appears.
7. The update runs automatically. Do not touch anything for up to 40 minutes.
8. When “Completed!” shows, remove USB and power cycle the receiver.