Troubleshooting - Casio LK-70S User Manual

Troubleshooting

Problem
No keyboard sound
Any of the following symptoms
while using battery power.
• Dim power supply indicator
• Instrument does not turn on
• Dim, difficult to read display
• 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
• 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 demo tune play
• Abnormally low microphone volume
• Distortion of microphone input
• Dim power supply indicator when a microphone is used
• Sudden power failure when using the microphone
• Dimming of keyboard lights when notes sound
• Loss of power, sound distortion, or low volume when playing from a connected computer
Auto Accompaniment does not
sound.
Key light stays on.
Keys are lit though no sound is
being produced.
653A-E-047B
LK70S_e_45-47.p65
Possible Cause
(1) Power supply problem.
(2) Power is not turned on.
(3) Volume setting is too low.
(4) The POWER/MODE switch is
in the CASIO CHORD or
FINGERED position.
(5) LOCAL CONTROL is off.
Low battery power
Accompaniment volume is set to
00.
Keyboard is waiting for play of
the correct note during Step 1 or
Step 2 play.
Power on alert is reminding you
that power was left on without
any operation being performed.
45
Action
(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) Adjust the POWER/MODE
switch to turn on power.
(3) Use the MAIN VOL. slider to
increase volume.
(4) Normal play is not possible on
the accompaniment keyboard
while the POWER/MODE
switch is set to CASIO CHORD
or FINGERED. Change the
POWER/MODE switch setting
to NORMAL.
(5) Turn on LOCAL CONTROL.
Replace the batteries with a set of
new ones or use the AC adaptor.
Use the FUNCTION button to
increase the volume.
• Press the lit key to continue with
Step 1 or Step 2 play.
• Press the START/STOP button
to quit Step 1 or Step 2 play.
Press any button or keyboard key
to restore power to normal.
04.8.18, 11:04 AM
See page
Pages
E-14,15
Page E-17
Page E-17
Page E-29
Page E-37
Pages
E-14, 15
Page E-33
Page E-23
Page E-23
Page E-15
E-45