Casio LK-43 manual Technical Reference, Troubleshooting, Symptom Cause Action See

Technical Reference

Troubleshooting

Be sure to check the following table whenever you experience problems with keyboard operation.

Symptom	Cause		Action	See Page
• No sound when keyboard keys	1. Power supply problem.	1.	C o r r e c t l y a t t a c h t h e A C	Page E-12
are pressed.			adaptor, make sure that
			batteries (+/–) are facing
			correctly, and check to make
			sure that batteries are not dead.
	2. Volume is set to 0.	2.	Press the VOLUME button.	Page E-15
	3. Headphones are plugged into	3.	Unplug the headphones from	Page E-14
	the keyboard.		the PHONES/OUTPUT jack.
	4. The POWER/MODE selector is	4.	Normal play is not possible on	Page E-18
	in the CASIO CHORD or		the accompaniment keyboard
	FINGERED position.		while the POWER/MODE
			selector is set to CASIO
			C H O R D o r F I N G E R E D .
			Change the POWER/MODE
			selector setting to NORMAL.
	5. Tone “99 PERCUSSION” is	5.	While “99 PERCUSSION” is	Page E-16
	selected and you are pressing		selected, you can use only keys
	keys that are not assigned tones.		that are marked on the console
			with illustrations of percussion
			instruments.
	6. LOCAL CONTROL is off.	6.	Turn on LOCAL CONTROL.	Page E-31
• Any of the following symptoms	• Low battery power	• Replace the batteries with a set		Page E-12
while using battery power.			of new ones or use the AC
• Dim power indicator			adaptor.
• 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
volume
• Sudden power failure when
playing at high volume
• 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 Song Bank play
• L o s s o f p o w e r , s o u n d
distortion, or low volume
w h e n p l a y i n g f r o m a
connected computer or MIDI
device
• Key light stays on.	• Keyboard is waiting for play of	1. Press the lit key to continue with		Pages
	the correct note during Step 1		Step 1 or Step 2 play.	E-26, 27
	or Step 2 play.	2. Press the START/STOP button		Pages
			to quit Step 1 or Step 2 play.	E-26, 27
E-32				640A-E-034A

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