Onkyo TX SR403 Instruction Manual
![Onkyo TX SR403 manual cover](/images/30b3bbf3c91684a92117f155/thumbs/thumb175x175.webp)
To reset your Onkyo TX SR403 to factory settings, turn off the receiver. Then, while holding down the "VCR/DVD" button, press the "Standby/On" button. When you see "Clear" on the display, release the buttons. This will reset the receiver.
First, ensure that all speaker connections are secure. Check that the correct input source is selected and that the volume is turned up. Also, verify that the receiver is not set to "Mute." If the issue persists, try resetting the receiver.
The Onkyo TX SR403 does not have built-in Bluetooth capability. However, you can use an external Bluetooth adapter connected to one of the available input ports to stream audio from a Bluetooth-enabled device.
To improve FM radio reception, ensure that the FM antenna is fully extended and positioned to receive the best signal. You might need to reposition the antenna or use an outdoor antenna for better reception.
The Onkyo TX SR403 does not support firmware updates via the internet or USB. Firmware updates, if available, would require professional servicing. Contact Onkyo support for assistance.
Connect your speakers to the corresponding speaker terminals on the receiver. Use the receiver's setup menu to configure the speaker settings, ensuring the correct speaker sizes and distances are set. Select a surround sound mode compatible with your input source.
Ensure that the receiver is well-ventilated and not overheating. Check for any short circuits in the speaker wires. If the issue persists after checking these, there may be an internal fault requiring professional service.
Yes, you can connect the Onkyo TX SR403 to a modern TV using RCA (analog) or optical audio outputs from the TV to the receiver's corresponding input. Ensure the TV is set to output audio to external speakers.
Regularly dust the exterior and ensure the vents are clear to prevent overheating. Check that all connections are secure and inspect cables for wear. Avoid placing the receiver in direct sunlight or in damp areas.
First, replace the batteries in the remote control. Ensure there are no obstructions between the remote and the receiver. If the problem continues, try resetting the remote by removing the batteries and pressing the power button for a few seconds before reinserting the batteries.