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E-26
Technical Reference
Troubleshooting
Be sure to check the following table whenever you experience problems with keyboard operation.
CauseSymptom Action
• No sound when keyboard keys
are pressed.
• Any of the following symptoms
while using battery power.
• Key light stays on.
• RHYTHM button does not
work.
1. Power supply problem.
2. Volume setting is too low.
3. Headphones are plugged into
the keyboard.
4. The POWER/MODE selector is
in the CASIO CHORD or
FINGERED position.
5. Tone “99 PERCUSSION” is
selected and you are pressing
keys that are not assigned tones.
• Low battery power
• Keyboard is waiting for play of
the correct note during Step 1
or Step 2 play.
• Keyboard is in the Song Bank
Mode.
1. Correctly attach the AC
adaptor, make sure that
batteries (+/–) are facing
correctly, and check to make
sure that batteries are not dead.
2. Use the VOLUME slider to
increase volume.
3. Unplug the headphones from
the PHONES/OUTPUT jack.
4. Normal play is not possible on
the accompaniment keyboard
while the POWER/MODE
selector is set to CASIO
CHORD or FINGERED.
Change the POWER/MODE
selector setting to NORMAL.
5. While “99 PERCUSSION” is
selected, you can use only keys
that are marked on the console
with illustrations of percussion
instruments.
• Replace the batteries with a set
of new ones or use the AC
adaptor.
1. Press the lit key to continue with
Step 1 or Step 2 play.
2. Press the START/STOP button
to quit Step 1 or Step 2 play.
• Press the SONG BANK button
to return to the normal mode.
See Page
Page E-11
Page E-14
Page E-13
Page E-17
Page E-14
Page E-11
Pages
E-23, 24
Pages
E-23, 24
Page E-20
• 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
LK120_e_26-29.p65 10.3.19, 5:28 PM26