Appendix; Troubleshooting - Yamaha AP-U70 Manual De Operaciones

APPENDIX

Troubleshooting

Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or if the
instructions given below do not help, disconnect the power cord and contact your authorized YAMAHA dealer or service
center.
Problem
The unit cannot be turned on
though the power switch is
pressed.
No sound.
No surround effect.
When making a recording from an
audio CD to an MD, CD-R, etc., all
tracks are recorded as one track.
Program sources on an MD, CD-R,
etc. which is a copy of an audio
CD, cannot be recorded on the
computer via the USB connection.
Signals inputted to your computer
via the USB connection cannot be
recorded on the computer.
No effect of Dolby Digital or DTS
though the sound field program
"VDD" is selected.
Different sounds are heard
together.
Left and right volume levels are
different.
Cause
The power cord is not plugged in or is not
completely inserted.
This unit is in the standby mode.
Incorrect output cord connections.
The muting function of this unit is on.
Headphones are connected to the headphone
jack of this unit.
The volume is set to minimum.
The playback source is not selected by the
input selector keys.
The power of the equipment selected as the input
source is off.
The DSP is off.
A DSP sound field program is selected or the
built-in graphic equalizer is used.
You cannot make a recording from a CD-R,
MD, etc. which is a copy of an audio CD, to
another CD-R, MD, etc. via the USB
connection or the digital terminal connection.
Incorrect setting of the recording device on the
computer.
The playback source is encoded with neither
Dolby Digital nor DTS.
Sound from the computer via the USB
connection may be mixed with sound from
other sources because the "USB Mix" setting is
set to "ON" with the Application Software.
The level balance is not set to center on the
"Balance" setting on the VIRTUAL panel in the
Application Software.
Remedy
Firmly plug in the power cord.
Turn on this unit by pressing the power switch on the
front panel or the POWER key on the remote control.
Connect the cords properly. If the problem
persists, the cords may be defective.
Turn off the muting by pressing the MUTE key.
Disconnect the headphones from the
headphone jack to output sound from the
speakers.
Increase the volume.
Select the playback source using the input
selector keys.
When PC is selected as the input source, check
that the digital or analog input is correctly
selected.
Turn on the equipment.
Turn on the DSP.
Turn off the DSP and the graphic equalizer.
Record the signals of such an MD, CD-R, etc. on
the computer by sending the signals via an
analog connection.
Correctly set the recording device on the
computer. [Refer to "Recording on computer (via
the USB connection") on page 12.]
Use a source encoded with Dolby Digital or DTS.
Set the "USB Mix" setting to "OFF" if you do not
want to hear mixed sounds.
Set the level balance to center.
APPENDIX
19
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