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Yamaha CBX-K2 Owner's Manual: Troubleshooting

Yamaha mini keyboard owner's manual.
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Even though the CBX-K2 is easy to use, it may occasion-
ally not function as you expect it to. If that happens, check
the possible problems and solutions below before assuming
that the instrument is faulty.
— (Possible Cause and Solution)
No sound from the connected device.
— The cables may have been connected incorrectly.
— Controller data, such as Volume, Expression and Master
Volume, may have been set to values too low to produce
— The Fixed Velocity setting may be too low.
When the power is turned off and on again, the
settings you made have been cancelled.
— This is normal. The CBX-K2 has no internal memory backup.
Sound is cut off.
— When incoming active sensing messages exceed that allowed
by the MIDI standard, the sound will automatically be cut off.
A certain function does not respond or work prop-
— The connected MIDI device may not support the relevant
function on the CBX-K2.
Specific functions/messages cannot be executed or
sent properly.
— While holding down C in the middle of an operation, you
may have inadvertently released C. Make sure to hold
down C for the duration of the operation.
The connected device does not respond or synchro-
nize to MIDI clock messages, or MIDI clock mes-
sages are not sent.
— Make sure that the Tempo setting on the CBX-K2 is set to a
value other than oFF. Also make sure that the connected
device is set properly for receiving MIDI clock messages. If
another device is connected to the MIDI IN of the CBX-K2
and that device is sending the MIDI clock messages, Merge
must be set to ON.
The Tempo cannot be set.
— The Tempo setting is inactive when Tempo is assigned to the
Assignable Wheel or Slider.
With Merge set to ON, tempo change messages sent
from an external device have no effect.
— If an external device is connected to the MIDI IN of the CBX-
K2, and the CBX-K2 is sending its own MIDI clock messages,
the MIDI clock messages of the external device will not be
sent via MIDI OUT. To have the external device's clock
messages sent, set Tempo on the CBX-K2 to 0.
Sending a bank select message also sends a pro-
gram change message.
— This is normal. The CBX-K2 automatically sends the
currently set program change number together with a bank
select message.
The RPN or NRPN controller number assigned to the
Assignable Wheel doesn't function properly.
The RPN or NRPN direct data send function doesn't
work properly.
— Please refer to the Merge-related Notes, page 34.
Octave Shift function has no effect.
— Octave Shift cannot be changed while a key is being held
The error message "E2" appears in the LED display
and the M lamp flashes, indicating a
"MIDI buffer full" error.
— A MIDI "loop" may have been set up. To remedy this, set
MIDI Merge to OFF. (Pages 26 and 28.)
— Too much MIDI data (exceeding the receive capability of the
CBX-K2) may have been received at MIDI IN.
An "E1" message appears in the LED display.
— The battery power is too low for proper operation. Replace all
The keyboard is not touch sensitive.
— Make sure that Fixed Velocity is set to oFF.
— When the Assignable Wheel or Slider is assigned to Velocity
(157), Touch Sensitivity does not function.
The Fixed Velocity setting has no effect.
— The Fixed Velocity setting is inactive when Velocity is
assigned to the Assignable Wheel or Slider.
Even when Touch Sensitivity is active, the effective
velocity range is narrower than expected.
— Please refer to Footnote #5 on page 28 for details on velocity
The All Sound Off function has no effect.
— All Sound Off in the Group A functions only applies to the
currently selected MIDI channel.
The right-most five keys of the keyboard do not
sound at the expected pitch.
— When set to the highest octave range, the right-most five keys
are set one octave down.
Some of the keys do not respond to after touch
pressure when playing several notes simultaneously.
— Polyphonic Key Pressure (After Touch) applies only to the
highest note played.
Incoming data is not merged.
— Make sure that Merge is set to ON. Make sure also that the
Merge on/off function in Group B is set to ON for the relevant
MIDI channel.
Some messages cannot be merged.
— Please refer to the Merge-related Notes, page 34.
Merge is inadvertently set to OFF.
— When there is a MIDI error, Merge is automatically turned off.
Please also refer to the Merge-related Notes, page 34.
The tone generator continues to sound after a key is
— This may be caused by a MIDI error and may happen depend-
ing on the Merge setting. Please refer to the Merge-related
notes, page 34.
When turning Merge off, the connected tone genera-
tor continues to sound.
— Execute the All Sound Off function (in the Group B functions;
pages 28 – 29).
— Please refer to the Merge-related Notes, page 34.


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