Power Supply

This keyboard can be powered by current from a standard household wall outlet (using the specified AC adaptor) or by batteries. Always make sure you turn the keyboard off whenever you are not using it.

■Using batteries

Always make sure you turn off the keyboard before loading or replacing batteries.

To load batteries

1. Remove the battery compartment cover.

2. Load 6 AA-size batteries into the battery compartment.

• Make sure that the positive (+) and negative (–) ends are facing correctly.

3. Insert the tabs on the battery compartment cover into the holes provided and close the cover.

The keyboard may not function correctly if you load or replace batteries with power turned on. If this happens, turning the keyboard off and then back on again should return functions back to normal.

Important Battery Information

■The following shows the approximate battery life provided by different battery types.

• Standard battery life: Approximately 1 hour (SUM3/R6P)

Approximately 4 hours (AM3/LR6)

Both of the above values are standard battery life at normal temperature, with the keyboard volume at a medium setting. Temperature extremes or playing at very loud volume settings can shorten battery life.

■Any of the following symptoms indicate low battery power. Replace batteries as soon as possible whenever any of the following occurs.

•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

•Abnormal rhythm pattern and demo tune play

•Dimming of keyboard lights when notes sound

•Loss of power, sound distortion, or low volume when playing from a con- nected computer or MIDI device

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Casio LK-40 manual Power Supply, Using batteries, To load batteries, Important Battery Information
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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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