Casio CTK-691 - Manual (Page 86)

Troubleshooting
E-84
Playing the keyboard sounds two tones. Layer is turned on. Press the LAYER button to turn off layering. E-66
Different tones sound when keys in
different keyboard ranges are pressed. Split is turned on. Press the SPLIT button to turn off
split. E-67
The key or tuning does not match
when playing along with another
MIDI machine. 1. The tuning or transpose parameter is
set to a value other than 00.
2. Mixer coarse tune, fine tune, and/or
octave shift settings are values other
than 00.
1. Change the transpose or tuning
parameter value to 00.
2. Use the Mixer to change the
coarse tune, fine tune, and/or
octave shift settings to 00.
E-69, 70
E-42
Parts suddenly drop out during
song memory playback. The number of tones being played at the
same time exceeds the keyboard’s
limitation. Use the Mixer to turn unneeded
channels off and decrease the
number of parts being played. E-40
Some parts do not play at all
during song memory playback. 1. Channels are turned off.
2. Volume setting is too low.
1. Use the Mixer to turn channels
on.
2. Use the Mixer to check the
volume setting.
E-40
E-40, 41
Nothing happens when the
LAYER or SPLIT button is
pressed. 1. One or more of the melody channels
(2 through 4) is turned off.
2. The volume setting of one or more of the
melody channels (2 through 4) is too low.
3. The keyboard is in record standby.
4. The SMF Player Mode is currently
being use.
1. Use the Mixer to turn on
Channels 2 through 4.
2. Use the Mixer to raise the volume
setting of Channels 2 through 4.
3. The LAYER and SPLIT buttons
are disabled during recording
and record standby.
4. Turn off the SMF Player Mode.
LAYER and SPLIT are not available
while the SMF Player Mode is in use.
E-40
E-40, 41
E-66, 67
E-76
No sound is produced when
playing MIDI data from a
computer. 1. MIDI cables are not connected
properly.
2. Channel is turned off, or volume
setting is too low.
1. Connect MIDI cables properly.
2. Use the Mixer to turn the channel
on, or raise the volume setting.
E-80
E-40, 41
Playing on the keyboard produces
an unnatural sound when
connected to a computer. The computer’s MIDI Thru function is
turned on. Turn off the MIDI Thru function on
the computer or turn off Local
Control on the keyboard. E-75
Cannot record chord
accompaniment data on a computer. Accomp/Song MIDI Out is turned off. Turn on Accomp/Song MIDI Out. E-75
The keyboard starts up
abnormally when it is turned on. Flash memory is corrupted. 1. Remove the batteries from the
keyboard and disconnect the AC
adaptor and press the POWER button.
2. Reload the batteries and/or
reconnect the AC adaptor, and
then press the POWER button
again to turn on power
3. Use the TRANSPOSE/
FUNCTION button to perform
the system reset operation
Š If this does not solve the
problem, contact your nearest
authorized CASIO Service
Provider to request repair.
E-75
A downloaded tone with
waveform contains noise or
keyboard operations become
abnormal when user data is
selected. Someone may have turned off the
keyboard while data was being stored in
Flash memory or something else has
caused Flash memory contents to become
corrupted for some reason. Use the TRANSPOSE/FUNCTION button
to perform the system reset operation.
If this does not correct the problem,
contact your nearest authorized CASIO
Service Provider to request maintenance. E-75
Problem Possible Cause Action See page
705A-E-086B