Onkyo HT-R420 appendix Troubleshooting, Amplifier Remote controller Symptoms Causes Remedies Pages

Troubleshooting

Check the following guide for the possible cause of a problem before contacting service. Refer also to the respective instruction manuals of the connected components and TV.

Amplifier

Remote controller

Symptoms	Causes	Remedies	Pages
The AV receiver doesn’t	• The power cord is disconnected.	• Check the connection of the power cord.	17
switch on.	• There is external noise interfering with the	• Disconnect the power cord, then connect it	17
	computer circuits of the AV receiver.	again.
Power shuts off	• Amplifier protection circuitry has been	• Contact your Onkyo Service Center.	–
immediately after power on.	activated.
The buttons on the remote	• Power supply fluctuations or other	• Disconnect the power cord, then connect it	–
controller and AV receiver	abnormalities such as static electricity	again.
do not operate.	may interrupt correct operation.
No sound is reproduced.	• The muting function is activated.	• Deactivate the muting function.	24
	• The AV receiver is not properly	• Check the connections to the AV receiver.	10, 11
	connected.	• Set to correct input source.	17, 22
	• Input selector is not set properly.
	• Headphones are connected.	• Decrease the volume, then disconnect the	24
		headphones.	–
	• The input signal format is set to “PCM” or	• Set the input signal format to “Auto”.
	"DTS".
No sound or very little	• The speakers are not properly connected.	• Check the speaker connections.	13
sound is reproduced from	• The listening mode is set to “Stereo” or	• No sound is reproduced from the center	29
the center speaker.	“Orchestra”.	speaker when the listening mode is
		“Stereo” or “Orchestra”.	20, 26
	• The volume level of the center speaker	• Adjust the volume level of the center
	(“Center”) is set to minimum.	speaker.	18
	• A speaker configuration without the center	• Check that the selected speaker
	speaker is selected.	configuration includes the center speaker.
Hum, low-frequency noise.	• The placement of the audio connection	• Adjust the placement of the cable to	–
	cables on the rear panel is incorrect.	reduce hum.
Rough or scratchy sound.	• Treble control too high.	• Use audio adjust function to cut the treble	30
High range is not clear.		response.
No sound or very low	• Subwoofer mode is set to “Off”.	• Check the subwoofer mode setting.	20
volume from subwoofer.	• Subwoofer mode setting is improper.	• Check the subwoofer mode setting.	20
No picture appears on the	• The TV is not set to receive the output	• Set the TV to the AV receiver’s input.	–
TV screen.	signals from the AV receiver.
	• The video cable is not connected	• Check the connections between the AV	10
	securely.	receiver and TV set.	10, 11
	• Only the S video connection is made.	• Also make video connection. Check the
		TV’s video input and AV receiver’s output
		signal.
The sound of the playback	• Another input source is selected.	• Select the appropriate input source.	17, 22
source is not heard.
The buttons on the AV	• Any wrong mode button is pressed.	• Press the appropriate mode control	35-37
receiver operate but the		button.
buttons on the remote	• No batteries are inserted in the remote	• Insert new batteries.	5
controller do not operate.	controller.	• Replace with new batteries.	5
	• The batteries are worn out.
	• The remote controller is not pointed at the	• Point the remote controller at the remote	5
	remote sensor of the AV receiver.	sensor of the AV receiver.
	• The remote controller is too far from the	• Operate the remote controller within	5
	AV receiver.	16 feet (5 m).

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