Onkyo TX NR646 Basic Manual
![Onkyo TX NR646 manual cover](/images/2f66d315395dd9b04e845d32/thumbs/thumb175x175.webp)
To perform a factory reset on your Onkyo TX NR646, press and hold the "VCR/DVR" button on the front panel, then press the "ON/STANDBY" button. Continue holding both buttons until "Clear" appears on the display. Release the buttons to reset the receiver to its factory settings.
First, ensure that all cables are securely connected and the correct input source is selected. Check the speaker connections and verify that the speakers are functioning. Additionally, ensure that the receiver is not muted and the volume is turned up. If the issue persists, try resetting the receiver.
To update the firmware, connect the receiver to the internet via Ethernet or Wi-Fi. Press the "Home" button on the remote, navigate to "Setup", then select "Hardware Setup" followed by "Firmware Update". Choose "via Network" and follow the on-screen instructions to complete the update process.
Ensure that the receiver has adequate ventilation and is not placed in an enclosed space. Remove any objects blocking the air vents. If the problem continues, consider using an external fan or cooling system to improve airflow around the receiver.
Yes, the Onkyo TX NR646 supports Bluetooth connectivity. To pair a device, press the "Bluetooth" button on the remote control, ensure your device is in pairing mode, and select the receiver from the list of available devices on your Bluetooth device.
Connect the speakers to the appropriate terminals on the back of the receiver. Use the "Speaker Setup" menu in the "Setup" section to select "5.1" under "Speaker Configuration". Adjust the speaker distances and levels according to your room layout for optimal sound performance.
Press the "Home" button on the remote, go to "Setup", then "Network Setup". Select "Wi-Fi" and choose your network from the list of available networks. Enter the Wi-Fi password when prompted to connect the receiver to your wireless network.
In the "Setup" menu, navigate to "Zone 2". Connect speakers to the Zone 2 terminals, and set the output to "Zone 2". You can control the volume and select input sources for Zone 2 using the remote or the front panel controls.
First, replace the batteries in the remote control. Ensure there are no obstructions between the remote and the receiver. Verify that the remote control is set to the correct mode (e.g., "Receiver" mode). If the issue persists, try resetting the remote by removing the batteries and pressing each button twice.
Ensure that you are using high-speed HDMI cables, especially for 4K content. Check that the HDMI cables are securely connected and not damaged. In the "Setup" menu, navigate to "HDMI Setup" and enable "HDMI Deep Color" for compatible devices to improve signal quality.