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Yamaha CBX-K1 Owner's Manual: Troubleshooting

Yamaha mini keyboard owner's manual cbx-k1.
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Even though the CBX-K1 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)
Specific functions/messages cannot be executed or sent
— 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.
A certain function does not respond or work properly.
— The connected MIDI device may not support the relevant
function on the CBX-K1.
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 in the MIDI Data
Format section, page 24.
Merge is inadvertently set to OFF.
— When there is some kind of MIDI receive error, Merge is
automatically turned off. Please also refer to the Merge-
related Notes in the MIDI Data Format section, page 24.
When turning Merge off, the connected tone generator
continues to sound.
— Please refer to the Merge-related Notes in the MIDI Data
Format section, page 24.
The connected device does not respond to MIDI clock
messages, or MIDI clock messages are not sent.
— Make sure that the Tempo setting on the CBX-K1 is set to a
value other than 0. 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-K1 and that
device is sending the MIDI clock messages, Merge must be set
to ON.
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-
K1, and the CBX-K1 is sending MIDI clock messages, the
external device cannot be used to send MIDI clock messages.
Sending a bank select message also sends a program change
— This is normal. The CBX-K1 automatically sends the
currently set program change number together with a bank
select message.
The RPN or NRPN controller number assigned to the ASSIGN-
ABLE Wheel doesn't function properly.
The RPN or NRPN direct data send function doesn't work
— Please refer to the Merge-related Notes in the MIDI Data
Format section, page 24.
When the power is turned off and on again, the settings you
made have been cancelled.
— This is normal. The CBX-K1 has no internal memory backup.
Octave Shift function has no effect.
— Octave Shift cannot be changed while a key is being held
The B lamp flashes, indicating a MIDI error.
— There may be a problem with incoming Active Sensing
messages. (See the Note on page 9.)
— A MIDI device connected to MIDI IN may have been turned
off, or the connecting MIDI cable may have been unplugged
or damaged.
— Make sure not to connect a MIDI cable to the MIDI IN while
executing a function on the CBX-K1.
— Too much MIDI data (exceeding the receive capability of the
CBX-K1) may have been received at MIDI IN.
Instead of both V / B lamps flashing
(indicatiing proper execution of an operation), only the
V lamp flashes.
— 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 0.
The Fixed Velocity setting has no effect.
— Tne Fixed Velocity setting is inactive when Velocity is
assigned to the ASSIGNABLE Wheel.
The Tempo setting has no effect.
— Tne Tempo setting is inactive when Tempo is assigned to the
The All Sound Off function has no effect.
— All Sound Off in the Group A functions only applies to the
cureently selected MIDI channel. Also, some tone generators
may not respond to the All Sound Off message.
The rightmost five keys of the keyboard do not sound at the
expected pitch.
— When set to the highest octave range, the rightmost five keys
are set to play notes Gm4 (80) through C5 (84).
Even when Touch Sensitivity is active, the effective velocity
range is narrower than expected.
— Please refer to Footnote #2 on page 21 for details on velocity
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.


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