Onkyo TX-NR747 Stereo Receiver User Manual


 
Troubleshooting
En-65
that support DVD, the default setting is off.
With some DVD-Video discs, you need to select an
audio output format from a menu.
¼ One of the speakers produces no sound
Make sure that the polarity of the speaker cables is
correct, and that no bare wires are in contact with the
metal part of speaker terminals.
Make sure that the speaker cables are not shorting.
Make sure the speakers are configured correctly.
¼ Only the front speakers produce sound
When the Stereo or Mono listening mode is selected,
only the front speakers and subwoofer produce sound.
¼ Only the center speaker produces sound
If you use the Dolby Surround listening mode with a
mono source, such as an AM radio station or mono
TV program, the sound is concentrated in the center
speaker.
¼ The surround speakers produce no sound
When the T-D (Theater-Dimensional), Stereo or Mono
listening mode is selected, the surround speakers
produce no sound.
Depending on the source and current listening mode,
not much sound may be produced by the surround
speakers. Try selecting another listening mode.
¼ The center speaker produces no sound
When the Stereo or Mono listening mode is selected,
the center speaker produces no sound.
¼ No sound from the back speakers and height
speakers
Depending on the source and current listening mode,
not much sound may be produced by the speakers. Try
selecting another listening mode.
¼ The subwoofer produces no sound
When the input signal does not include a subwoofer
audio element (LFE), the subwoofer may not produce
sound.
¼ Volume is low
Check the volume. The volume level is adjustable
between Min, 1 to 99, Max (100). A level of around 40 is
normal in a domestic environment.
¼ There is no sound from a connected turntable�
If your turntable uses an MC cartridge, you must
connect an audio equalizer and either an MC head amp
or an MC transformer.
¼ Noise can be heard
Using cable ties to bundle audio cables with power
cords, speaker cables, etc. may degrade the audio
performance, so refrain from doing it.
An audio cable may be picking up interference. Try
repositioning your cables.
¼ The sound changes when I connect my headphones
When a listening mode other than Direct, Pure Audio
(European, Australian and Asian models), or Mono is
selected, connecting a headphone automatically selects
Stereo.
¼ About DTS signals
When DTS program material ends and the DTS
bitstream stops, the unit remains in DTS listening mode
and the dts indicator remains on. This is to prevent noise
when you use the pause, fast forward, or fast reverse
function on your player. If you switch your player from
DTS to PCM, you may not hear any sound because the
unit does not switch formats immediately. In such case,
you should stop your player for about 3 or more seconds
and then resume playback.
With some CD and LD players, you will not be able
to playback DTS material properly even though your
player is connected to a digital input on the unit. This is
usually because the DTS bitstream has been processed
(e.g., output level, sampling rate, or frequency response
changed) and the unit does not recognize it as a
genuine DTS signal. In such cases, you may hear noise.
When playing DTS program material, using the pause,
fast forward, or fast reverse function on your player may
produce a short audible noise. This is not a malfunction.
¼ The beginning of audio received by an HDMI IN
cannot be heard
Since it takes longer to identify the format of an HDMI
signal than it does for other digital audio signals, audio
output may not start immediately.
¼ The volume has suddenly dropped
If this unit is used for a long time even after the internal
temperature of this unit exceeds a certain threshold,
the volume may be lowered automatically to protect the
circuitry.
Listening Mode
When listening to Dolby Digital and/or DTS sound,
digital connection is necessary.
Check the digital audio output setting on the connected
component. On some game consoles, such as those
that support DVD, the default setting is off.
After pressing RECEIVER on the remote controller,
repeatedly press DISPLAY to switch the display on the
main unit. You can see the input format.
If the above does not solve the problem, check the
following.
¼ Cannot select a desired listening mode
Depending on the connecting status of the speaker,
some listening modes may not be selected. Check the
details in "Selectable Listening Modes" section.
¼ There is no sound with Dolby Atmos
You need to have either back speakers or height
speakers connected. After connecting each of the
speakers, make sure the connection settings in
"Configuration" - "Speaker Channels" are correct.
Dolby Atmos play is only possible when the input signal
is Dolby Atmos.
¼ Cannot select the Pure Audio listening mode
(European, Australian and Asian models)
The Pure Audio listening mode cannot be selected while
Zone 2 is on.
Video
Check that the output jack of the connected equipment
and the input jack of this unit are connected correctly.
Make sure that none of the connecting cables are bent,
twisted, or damaged.
Make sure the switching of input screens is proper at the
monitor side such as a TV.
If the above does not solve the problem, check the
following.
¼ There is no picture from a source connected to an
HDMI IN
The input selector of this unit needs to be in the
position that corresponds to the jack where the player is
connected.
While the Pure Audio (European, Australian and Asian
models) listening mode is selected only video signals
input through HDMI IN can be output.
Check if "Resolution Error" is displayed on the main
unit display when video input via HDMI IN jack is not