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Appendix
CP88/CP73 Owner’s Manual
52
Troubleshooting
No sound? Wrong sound? When a problem like this occurs, please check the following points before assuming that the
product is faulty. Many problems can be solved by executing the Factory Reset operation (page 21). If the problem
persists, consult your Yamaha dealer.
Issue Suspected cause Solution
The instrument turns off
unexpectedly.
This is normal when the Auto Power Off
function is enabled.
If necessary, you can deactivate the Auto Power
Off function to prevent it turning off the
instrument again (page 21).
No sound is produced. Related external equipment (e.g., amplifier,
speaker, headphones) is not properly
connected to this instrument via audio
cables.
Since this instrument has no built-in speakers,
you will need an external audio system or a set of
stereo headphones to properly monitor it
(page 20).
Power to this instrument or the connected
external audio equipment are not turned on.
Check the power to this instrument and the
connected external audio equipment are turned
on.
The volume of this instrument and the
connected external audio equipment are
turned fully down.
Adjust the volume. Use the [MASTER
VOLUME] knob to adjust the volume. If a foot
controller has been connected to the FOOT
CONTROLLER [1]/[2] jacks, try using it to
increase the volume.
All the Voice section [ON/OFF] switches are
set to OFF.
Set the Voice section [ON/OFF] switch to ON.
The volume of Voice sections are turned
fully down.
Use the [VOLUME] knobs of each Voice section
to adjust the volume.
Local Control is set to “Off.” When the Local Control is set to “Off ”, the
internal tone generator will not sound. Set the
Local Control to “On” (page 30).
MIDI volume or expression has been set to a
very low level by an external MIDI
controller.
Select other Live Set Sound. If a foot controller
has been connected to the FOOT
CONTROLLER [1]/[2] jacks, try using it to
increase the volume.
A sound continues to play
without end.
Effect sound such as delay continues. Lower the feedback level or set the DELAY [ON/
OFF] switch to OFF. If other Live Set Sound is
selected during a sound continues to play, press
again the Live Set Sound button currently
selected.
Sounds are distorted. Effect settings are not appropriate. Sound will be distorted depending on the effect
types and the settings. Change the effect types
and the settings.
Volume is set too high. Adjust the volume.
Volume of this instrument and the external
audio equipment are set too high.
Adjust the volume of an external audio
equipment, or use the INPUT [GAIN] knob of
this instrument. You can also adjust the volume
from the “USB Audio Volume.”
Sound output is intermittent and
stuttered.
The entire sound exceeded the maximum
polyphony (128 notes).
Keep in mind not to exceed the maximum
polyphony.
No effect is applied. The depth is turned to the minimum level. Use the [DEPTH] knob to adjust the effect
depth.
Data communication between
the computer and this
instrument does not work
properly.
The Port settings on the computer is not
appropriate.
Check the port settings on the computer.
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