Onkyo HT-R648 Instruction Manual Download Page 59

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Appendix

Troubleshooting

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

■

Can’t turn on the AV receiver

■

The AV receiver turns off unexpectedly

■

The AV receiver turns off and after restoring the
power, it turns off again

■

There’s no sound, or it’s very quiet

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

VCR/DVR

, press

ON/STANDBY

. “Clear” will appear on the display

and the AV receiver will enter Standby mode.

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

HOME

until the remote indicator lights (about 3

seconds). Within 30 seconds, press

RECEIVER

again.

The on-screen setup menus appear only on a TV that
is connected to the

HDMI OUT

. If your TV is

connected to the

MONITOR OUT V

or the

COMPONENT VIDEO OUT

, use the AV receiver’s

display when changing settings.

Power

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.

—

When the set Auto Standby starts running, the AV
receiver will automatically go standby.

HOME

RECEIVER

Remote indicator

The protection circuit has been activated. Remove
the power cord from the wall outlet immediately.
Make sure that all speaker cables and input sources
are properly connected, and leave the AV receiver
with its power cord disconnected for 1 hour. After
that, reconnect the power cord and turn the power
on. If the AV receiver turns off again, unplug the
power cord and contact your Onkyo dealer.
Caution: If “

CHECK SP WIRE

” appears on the

display, the speaker cables may be shorting.

WARNING

If smoke, smell or abnormal noise is produced by the AV
receiver, unplug the power cord from the wall outlet
immediately and contact your Onkyo dealer.

Audio

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
components are connected properly.

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.

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.

While a pair of headphones is connected to the

PHONES

jack, no sound is output from the

speakers.

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

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

—

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

—

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

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

—

Not all listening modes use all speakers.

Specify the speaker distances and adjust the
individual speaker levels.

Make sure that the speaker setup microphone is not
still connected.

—

The input signal format is set to “