ONKYO AVX-280 ユーザーズマニュアル

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If you have any trouble using the AV receiver, look for a 
solution in this section. If you can’t resolve the issue your-
self, contact your Onkyo dealer.

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If you can’t resolve the issue yourself, try resetting the 
AV receiver before contacting your Onkyo dealer.
To reset the AV receiver to its factory defaults, turn it 
on and, while holding down 

Note that resetting the AV receiver will delete your 
radio presets and custom settings.

To reset the remote controller to its factory defaults, 
while holding down RECEIVER, press and hold down 
AUDIO until the remote indicator lights (about 3 sec-
onds). Within 30 seconds, press RECEIVER
again.

Make sure that the power cord is properly plugged 
into the wall outlet.

—

Unplug the power cord from the wall outlet, wait five 
seconds or more, then plug it in again.

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Remote indicator

The protection circuitry has been activated.
Remove the power cord from the wall outlet immedi-
ately. Disconnect all speaker cables and input 
sources, and then leave the AV receiver with its 
power cord disconnected for 1 hour. After that, 
reconnect the power cord and set the volume to max-
imum. If the AV receiver stays on, set then the vol-
ume to minimum, disconnect the power cord, and 
reconnect your speakers and input sources. If the AV 
receiver turns off when you set the volume to maxi-
mum, disconnect the power cord, and contact your 
Onkyo dealer.

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Press SPEAKERS A or B to turn on the indicator 
for the speakers that you want to output sound.

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Make sure that the digital input source is selected 
properly.

Make sure that all audio connecting plugs are pushed 
in all the way.

Make sure that the inputs and outputs of all compo-
nents are connected properly.

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Make sure that the polarity of the speaker cables is 
correct, and that the bare wires are in contact with 
the metal part of each speaker terminal.

Make sure that the input source is properly selected. 21

Make sure that the speaker cables are not shorting.

Check the volume. The AV receiver is designed for 
home theater enjoyment. It has a wide volume range, 
allowing precise adjustment.

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If the MUTING indicator is flashing on the display, 
press the remote controller’s MUTING to unmute 
the AV receiver.

While a pair of headphones is connected to the 
PHONES jack, no sound is output by the speakers.

If there’s no sound from a DVD player connected to 
an HDMI IN, check the DVD player’s output set-
tings, and be sure to select a supported audio format.

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Check the digital audio output setting on the con-
nected device. On some game consoles, such as 
those that support DVD, the default setting is off.

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With some DVD-Video discs, you need to select an 
audio output format from a menu.

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If your turntable uses an MC cartridge, you must 
connect an MC head amp, or an MC transformer.

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Make sure that none of the connecting cables are 
bent, twisted, or damaged.

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Not all listening modes use all speakers.

Specify the speaker distances and adjust the individ-
ual speaker levels.

The input signal format is set to “PCM” or “DTS”. 
Set it to “Auto”.