Casio 451 manual Troubleshooting, Problem Possible Cause Action See

Troubleshooting

Problem		Possible Cause		Action	See page
No keyboard Sound	1.	Power supply problem.	1.	Correctly attach the AC adaptor,	Page E-14
				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.	Set the POWER/MODE switch to	Page E-16
				the NORMAL position.
	3.	Volume setting is too low.	3.	Use the MAIN VOLUME button to	Page E-16
				increase volume.
	4.	The POWER/MODE switch is in	4.	Normal play is not possible on the	Page E-16
		the CASIO CHORD or FINGERED		accompaniment keyboard while the
		position.		POWER/MODE switch is set to
				CASIO CHORD or FINGERED.
				Change the POWER/MODE switch
				setting to NORMAL.
Any of the following symptoms	Low battery power		Replace the batteries with a set of new		Page E-14
while using battery power.			ones or use the AC adaptor.

•Dim power supply 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 totally different tone may sound

•Abnormal rhythm pattern and Song Bank play

•Loss of power, sound distor- tion, or low volume when playing from a connected computer or MIDI device

Auto Accompaniment does not	Auto accompaniment volume is set to		Use the ACCOMP VOLUME button to	Page E-21
sound.	0.		increase the volume.
The key or tuning does not	The tuning or transpose parameter is		Change the transpose or tuning pa-	Page E-29
match when playing along with	set to a value other than 0 or 00.		rameter value to 0 or 00.
another instrument.
Missing Song Bank tune.	1.	Left-hand or right-hand part is	1. Check the display to see if the indi-	Page E-24
		turned off.	cator for one of the parts is not dis-
			played. If so, press the part’s but-
			ton (LEFT ON/OFF, RIGHT ON/
			OFF) to turn it on.
	2.	Accompaniment volume is set to 0.	2. Adjust accompaniment volume.	Page E-21

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