Casio CTK900 - Manual (Page 82)

Troubleshooting
E-78
Troubleshooting
Problem Possible Cause Action See page
No keyboard Sound 1. Power supply problem.
2. Power is not turned on.
3. Volume setting is too low.
4. Playing in the accompaniment
keyboard area while the MODE
button setting is CASIO CHORD or
FINGERED.
5. Local Control is off.
6. Mixer channel 1 is turned off.
7. Mixer channel 1 volume setting is too
low.
1. Correctly attach the AC
adaptor, make sure that
batteries poles (+/–) are facing
correctly, and check to make
sure that batteries are not dead.
2. Press the POWER button to
turn on power.
3. Use the MAIN VOLUME knob
to increase volume.
4. None of the accompaniment
mode indicators are lit, which
means Auto Accompaniment is
turned off.
5. Turn on Local Control.
6. Use the Mixer to turn channel 1
on.
7. Use the Mixer to raise the
volume setting for channel 1.
E-12, 13
E-16
E-16
E-28
E-70
E-36
E-37, 38
Any of the following symptoms
while using battery power. Low battery power Replace the batteries with a set of
new ones or use the AC adaptor. E-12, 13
Auto Accompaniment does not
sound. 1. Accompaniment volume is set to 000.
2. Auto Accompaniment part Channels
6 through 10 are turned off.
3. Auto Accompaniment part Channels
6 through 10 volume setting is too
low.
1. Use the ACCOMP VOLUME
button to increase the volume.
2. Use the Mixer to turn the
channels on.
3. Use the Mixer to raise the
volume setting for the
applicable channel.
E-35
E-36
E-37, 38
Sound output does not change
when key pressure is varied. Touch response is turned off. Press the TRANSPOSE/
FUNCTION button to turn it on. E-64
Playing the keyboard sounds two
tones. Layer is turned on. Press the LAYER button to turn off
layering. E-61
Different tones sound when keys
in different keyboard ranges are
pressed. Split is turned on. Press the SPLIT button to turn off
split. E-62
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-64, 65
E-38
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-36
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-36
E-37, 38
• Dim power indicator
• Instrument does not turn on.
• Display that is flickering, dim, or
difficult to read
• Abnormally low speaker/headphone
volume
• Distortion of sound output
• Occasional interruption of sound
when playing at high volumes
• Sudden power failure when playing at
high volumes
• Flickering or dimming of the display
when playing at high volume
• Continued sound output even after
you release a key
• A tone that is totally different from the
one that is selected.
• Abnormal rhythm pattern and demo
tune play
• Loss of power, sound distortion, or
low volume when playing from a
connected computer or MIDI device
707A-E-080A