Other Information; Troubleshooting - Yamaha CK88 Owner's Manual

Other information

Troubleshooting

If the CK does not behave as expected—for example, not producing the correct sound or producing no sound at
all—you can try to resolve the issue as described below. Many issues can also be resolved by carrying out the Factory
Reset (page 67) operation. If any specific issue should persist, please contact your Yamaha dealer or a service center
(see the back of this booklet).
Issue
The CK turns off unexpectedly.
No sound is produced.
No sound is produced
from the built-in
speakers.
No sound is produced
from the connected
external device.
A sound continues to play indefinitely.
Sounds are distorted.
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CK88 CK61 Owner's Manual
Suspected cause
This is normal when the Auto Power Off
function is enabled.
All the Part [ON/OFF] buttons are OFF.
The Part volume is turned fully down.
Local Control is set to Off.
MIDI volume or expression has been set to a
very low level by an external MIDI controller.
SPEAKERS switch is set to OFF.
When the headphones are connected, the
built-in speakers may be muted in certain
settings as shown below.
• When the [MENU] button  General 
System  Speaker  Speaker Mute is set
to Auto.
• When the [MENU] button  General 
System  Speaker  Speaker Mute is set to
Manual and the SPEAKERS switch is set to
OFF.
Power to the CK or the connected external
audio device is not turned on.
The volume of the CK and the connected
external audio equipment are turned fully
down.
An Effect (such as delay) continues.
Effect settings are not appropriate.
Volume is set too high.
Output Gain is set too high.
Solution
If necessary, you can disable the Auto Power
Off function to prevent it from turning off
the CK again (page 36).
Set the desired Part [ON/OFF] button to ON.
Use the Part Volume sliders to adjust the
volume.
When Local Control is set to Off, the internal
tone generator will not play a sound when
you play the keyboard. Set Local Control to
On (page 37).
Try changing a Live Set Sound.
If a pedal has been connected to the FOOT
PEDAL jacks, move the pedal to change the
volume.
Set the SPEAKERS switch to ON.
Disconnect the headphones.
Set the SPEAKERS switch to ON.
Check the power to the CK and the
connected external audio device is turned
on.
Adjust the volume. Use the [MASTER
VOLUME] slider to adjust the volume. If a
pedal has been connected to the FOOT
PEDAL jacks, try moving the pedals.
Lower the [DEPTH] knob or set the EFFECT1
or EFFECT2 [ON/OFF] button to OFF. If a Live
Set Sound has been changed while a sound
continues to play, try selecting a different
Live Set Sound.
Sound will be distorted depending on the
effect types and the settings. Change the
effect types and the settings.
Adjust the volume. To adjust the overall
volume of the CK, move the [MASTER
VOLUME] slider. Or, use the [MENU] button
 General  Audio  Output Gain
(page 38).