Technical Reference

■Troubleshooting

Be sure to check the following table whenever you experience problems with key- board operation.

Symptom

 

Cause

 

Action

• No sound when keyboard

1.

Power supply problem.

1.

Correctly attach the AC

keys are pressed.

 

 

 

adaptor, make sure that bat-

 

 

 

 

teries poles (+/–) are facing

 

 

 

 

correctly, and check to make

 

 

 

 

sure that batteries are not

 

 

 

 

dead.

 

2.

Volume is set to 0.

2.

Press the VOLUME but-

 

 

 

 

ton.

 

3.

Headphones are plugged

3.

Unplug the headphones

 

 

into the keyboard.

 

from the PHONES/OUT-

 

 

 

 

PUT jack.

 

4.

The POWER/MODE selec-

4.

Normal play is not possible

 

 

tor is in the CASIO CHORD

 

on the accompaniment key-

 

 

or FINGERED position.

 

board while the POWER/

 

 

 

 

MODE selector is set to

 

 

 

 

CASIO CHORD or FIN-

 

 

 

 

G E R E D . C h a n g e t h e

 

 

 

 

POWER/MODE selector

 

 

 

 

setting to NORMAL.

 

5.

Tone “99 PERCUSSION” is

5.

While “99 PERCUSSION” is

 

 

selected and you are press-

 

selected, you can use only

 

 

ing keys that are not as-

 

keys to the left of B￿4. These

 

 

signed tones.

 

keys are marked on the con-

 

 

 

 

sole with illustrations of

 

 

 

 

percussion instruments.

 

 

 

• Any of the following symp-

• Low battery power

• Replace the batteries with a

toms while using battery

 

 

 

set of new ones or use the

power.

 

 

 

AC adaptor.

•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 vol- ume

•Abnormal rhythm pattern and demo tune play

•Dimming of keyboard lights when notes sound

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

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Casio LK-40 manual Technical Reference, Troubleshooting
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LK-40 specifications

The Casio LK-40 is a versatile and user-friendly portable keyboard designed for beginners and aspiring musicians. Its blend of features makes it an excellent choice for those looking to learn while having fun. The keyboard includes 44 full-size touch-sensitive keys that respond to the dynamics of playing, allowing for expressive performances and improved playing technique.

One of the standout features of the LK-40 is its "Lighted Key" function. This innovative technology lights up the keys to guide users during practice, making it easier to learn new songs and improve finger placement. The keys illuminate in a sequence to indicate which ones to press, creating an interactive learning experience that makes practice sessions more engaging.

The LK-40 includes 100 built-in tones and 50 rhythm patterns, providing a wide range of sounds for musical exploration. From pianos to strings, and from brass to percussion, the variety of tones enables users to experiment with different musical styles, making it suitable for genres ranging from classical to pop. The rhythm patterns can be combined with various tones, giving users the ability to create complex arrangements with ease.

To further enhance creativity, the keyboard features a built-in song bank with 10 demo songs. These tracks not only serve as entertaining pieces to listen to but also act as practice material for learners. Users can play along, helping to develop timing and coordination skills.

The LK-40 also supports a MIDI output, allowing it to connect to other MIDI-compatible devices, such as computers and synthesizers. This capability opens up new avenues for music production and performance, enabling users to record their songs or use software instruments.

Additionally, the Casio LK-40 is equipped with a headphone output, ensuring users can practice quietly without disturbing others. The built-in speakers deliver quality sound output, making it suitable for both practice and casual performances.

In summary, the Casio LK-40 is an excellent keyboard for beginners, boasting lighted keys, diverse tones, built-in rhythms, and user-friendly features. Its compact design and MIDI capabilities further enhance its versatility, making it a perfect companion for learning, practice, and creative expression in music.
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