Firmware Updates


Notice of Firmware Update for TX-RZ740

A firmware update for the TX-RZ740 network A/V receiver is available through the unit's USB input. The latest update includes the following content:

Latest Firmware Number (16 digits):R122-0708-1141-0029

As of 22 December 2020

  • Update Chromecast built-in version to 1.44.
  • Support ALLM "Auto Low Latency Mode".
  • FIx the issue that cannot display the logo of certain TuneIn Radio stations.
  • Improve reception capability in certain TuneIn Radio stations.

As of 28 October 2020

As of 4 August 2020

  • Support "Critical Listening mode of DTS Play-Fi".
  • Unlock IP/Serial/IR/Front Panel volume controls if using Sonos “Volume Pass-Through” feature.
  • Minor bug fixes and improvements stability.

As of 12 March 2020

  • Support "Volume Pass Through" mode for Sonos.*
  • *For detail about updated function, please refer to the link below.

  • Update Chromecast built-in version to 1.40.
  • Improve the list viewing for ''Albums/ Artists/ Songs'' in My Music of Amazon Music.
  • Fix the issue of Bluetooth connection with certain iOS devices.

As of 17 December 2019

As of 1 Aug 2019

As of 18 April 2019

  • Minor bug fixes and improvements stability.

How to Check if Your Firmware Version is Up To Date

To Check if your firmware is up to date, go into Home Menu ->Firmware Update and check the 16-digit number (xxxx-xxxx-xxxx-xxxx). If any numbers differ from the latest version available, please update your unit.

Precautions for TX-RZ740 Firmware Update

  • Please read the update instructions carefully before beginning.
  • The firmware update should take 30 to 40 minutes. Once the update begins, don't turn off the power supply to the A/V receiver until it is time to restart it.
  • Depending on the conditions of the network, a firmware update via a network may take more than one hour or even fail to finish. If the update is not completed within two hours, turn off the power supply by pushing the ON/STANDBY button and then try updating again from the beginning.
  • Updating the firmware and adjusting the settings will be done automatically, but may take some time to complete. Please follow the procedures as instructed when you update. Note that the update may fail, or cause problems for your A/V receiver, if you do any of the following:
  • Pull out the A/V receiver's power cord;
  • Interrupt the power supply to the A/V receiver (e.g. if the breaker is tripped or if there is an electrical outage);
  • Insert or remove the LAN cable from a device in your network when updating over a network;
  • Insert or remove a USB memory device from the A/V receiver when updating via USB;
  • Operate components connected to the A/V receiver via HDMI, such as a TV or a recording device.

If your A/V receiver is damaged for any of the reasons above, an Onkyo service center will repair the unit for a fee.