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Yamaha A-U670 Manual

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TROUBLESHOOTING
12 En
Only the speaker on one side can be
heard.
Incorrect cable connections. Connect the cables properly. If the problem persists, the cables may be
defective.
5
Incorrect setting for the BALANCE control. Set the BALANCE control to the appropriate position.
3
There is a lack of bass and no ambience. (When a subwoofer is connected.)
The subwoofer is not properly connected.
Connect the cables properly. If the problem persists, the setting for the
subwoofer may be incorrect.
6
The + and – wires are connected in reverse at the amplifier or the
speakers.
Connect the speaker wires to the correct + and – phase.
6
Incorrect setting for the BASS control. Set the BASS control to the appropriate position.
3
A “humming” sound can be heard. Incorrect cable connections. Connect the audio plugs firmly. If the problem persists, the cables may be
defective.
5
The sound level is low. The volume of the unit is set to a low level. Turn up the volume with the VOLUME control so that you can hear
sound.
7
(A-U670 only) The volume of the PC connected with the unit via
USB is set to a low level.
Turn up the volume of the PC.
-
(A-U670 only) The BASS, TREBLE, and
BALANCE controls does not work.
The PURE DIRECT function is turned on. Turn off the PURE DIRECT function.
10
(A-U670 only) The connected PC does not
recognize this unit.
The operating system of the PC is not supported. Use a PC with an operation-guaranteed operating system.
8
Improper USB cable connection. Connect the USB cable properly.
8
The output of the PC or application is muted. Cancel the sound muting of the PC or application.
-
(A-U670 only) Noisy playback. Another application is launched on the PC while a music file is
being played.
(If another application is launched while a music file is being
played, sound may be momentarily lost or noise may be generated.)
Do not launch other applications during playback.
-
(A-U670 only) The sound is interrupted. Another application is launched on the PC while a music file is
being played.
(If another application is launched while a music file is being
played, sound may be momentarily lost or noise may be generated.)
Do not launch other applications during playback.
-
(A-U670 only) Music files cannot be
played.
The music data are not properly reproduced, because this unit is
connected to the PC or the input of this unit is switched to USB
while the music application is running on the PC.
Connect this unit to the PC and set the input of the unit to USB in
advance. Then launch the music application and start playback.
8
The dedicated “Yamaha HiFi USB Driver” has not been installed
correctly.
Install the “Yamaha HiFi USB Driver” again by following the correct
procedure.
8
The audio output destination of the computer is not set to “Yamaha
A-U670/A-U671.”
Set the audio output destination of the computer to “Yamaha A-U670/A-
U671.”
9
Problem Cause Solution See page
… 14 …


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