Onkyo DR 645 Instruction Manual
![Onkyo DR 645 manual cover](/images/73a450724fc3f318ade816e8/thumbs/thumb175x175.webp)
To connect your Onkyo DR 645 to a TV, use an HDMI cable to connect the HDMI OUT port on the receiver to an HDMI IN port on your TV. Make sure both devices are powered off during connection.
First, ensure that the receiver is correctly set to the right input source. Check the speaker connections and make sure they are secure. Also, verify that the speaker settings are correctly configured in the receiver's menu.
To reset the Onkyo DR 645 to factory settings, press and hold the VCR/DVR button, then press the ON/STANDBY button. Hold both buttons until you see 'CLEAR' on the display. Release the buttons and the receiver will reset.
The Onkyo DR 645 does not have built-in Bluetooth capability. However, you can use an external Bluetooth adapter connected to the receiver's auxiliary input to stream music.
The Onkyo DR 645 does not support firmware updates over the internet. If an update is necessary, please contact Onkyo customer support for guidance on how to proceed.
The receiver may be overheating or there's a short in the speaker wires. Ensure that the unit is well-ventilated and that all speaker wires are connected properly without any frays or shorts.
Ensure that the speaker placement is optimal and that the room acoustics are considered. Also, use high-quality audio cables and adjust the receiver's audio settings to fit your preference.
Use a soft, dry cloth to gently wipe the exterior surfaces of the receiver. Avoid using any chemical cleaners or liquids to prevent damage to the unit.
Use the built-in test tone feature. Navigate to the receiver's setup menu, select Speaker Setup, and then Test Tone. The test tone will cycle through each speaker, allowing you to verify functionality.
Additional audio devices can be connected using available inputs on the receiver like RCA or optical inputs. Ensure that the correct input source is selected on the receiver for playback.