Casio CTK900 Troubleshooting, Action, Problem, See page, Possible Cause, E-78

Troubleshooting

Problem		Possible Cause		Action	See page
No keyboard Sound	1.	Power supply problem.	1.	Correctly attach the AC	E-12, 13
				adaptor, make sure that
				batteries poles (+/–) are facing
				correctly, and check to make
				sure that batteries are not dead.
	2.	Power is not turned on.	2.	Press the POWER button to	E-16
				turn on power.
	3.	Volume setting is too low.	3.	Use the MAIN VOLUME knob	E-16
				to increase volume.
	4.	Playing in the accompaniment	4.	None of the accompaniment	E-28
		keyboard area while the MODE		mode indicators are lit, which
		button setting is CASIO CHORD or		means Auto Accompaniment is
		FINGERED.		turned off.
	5.	Local Control is off.	5.	Turn on Local Control.	E-70
	6.	Mixer channel 1 is turned off.	6.	Use the Mixer to turn channel 1	E-36
				on.
	7.	Mixer channel 1 volume setting is too	7.	Use the Mixer to raise the	E-37, 38
		low.		volume setting for channel 1.
Any of the following symptoms	Low battery power		Replace the batteries with a set of		E-12, 13
while using battery power.			new ones or use the AC adaptor.
• Dim power indicator		• Occasional interruption of sound		• A tone that is totally different from the
• Instrument does not turn on.		when playing at high volumes		one that is selected.
• Display that is flickering, dim, or		• Sudden power failure when playing at		• Abnormal rhythm pattern and demo
difficult to read		high volumes		tune play
• Abnormally low speaker/headphone		• Flickering or dimming of the display		• Loss of power, sound distortion, or
volume		when playing at high volume		low volume when playing from a
• Distortion of sound output		• Continued sound output even after		connected computer or MIDI device
		you release a key
Auto Accompaniment does not	1.	Accompaniment volume is set to 000.	1.	Use the ACCOMP VOLUME	E-35
sound.				button to increase the volume.
	2.	Auto Accompaniment part Channels	2.	Use the Mixer to turn the	E-36
		6 through 10 are turned off.		channels on.
	3.	Auto Accompaniment part Channels	3.	Use the Mixer to raise the	E-37, 38
		6 through 10 volume setting is too		volume setting for the
		low.		applicable channel.
Sound output does not change	Touch response is turned off.		Press the TRANSPOSE/		E-64
when key pressure is varied.			FUNCTION button to turn it on.
Playing the keyboard sounds two	Layer is turned on.		Press the LAYER button to turn off		E-61
tones.			layering.
Different tones sound when keys	Split is turned on.		Press the SPLIT button to turn off		E-62
in different keyboard ranges are			split.
pressed.
The key or tuning does not match	1.	The tuning or transpose parameter is	1.	Change the transpose or tuning	E-64, 65
when playing along with another		set to a value other than 00.		parameter value to 00.
MIDI machine.	2.	Mixer coarse tune, fine tune, and/or	2.	Use the Mixer to change the	E-38
		octave shift settings are values other		coarse tune, fine tune, and/or
		than 00.		octave shift settings to 00.
Parts suddenly drop out during	The number of tones being played at the		Use the Mixer to turn unneeded		E-36
song memory playback.	same time exceeds the keyboard’s		channels off and decrease the
	limitation.		number of parts being played.
Some parts do not play at all	1.	Channels are turned off.	1.	Use the Mixer to turn channels	E-36
during song memory playback.				on.
	2.	Volume setting is too low.	2.	Use the Mixer to check the	E-37, 38
				volume setting.

E-78 707A-E-080A