Caution!

For safety sake, be sure to unplug the AC adaptor from the wall outlet whenever leaving the keyboard unattended for a long time (such as when leaving on a trip).

Always turn off the keyboard and unplug the AC adaptor from the wall outlet when you are not using the keyboard.

Important!

Make sure that the keyboard is turned off before connecting or disconnecting the AC adaptor.

Using the AC adaptor for a long time can cause it to become warm to the touch. This is normal and does not indicate malfunction.

Auto Power Off

When you are using battery power, keyboard power turns off automatically when- ever you leave it on without performing any operation for about 6 minutes. When this happens, move the POWER/MODE selector to the OFF position and then back to NORMAL, CASIO CHORD, or FINGERED to turn power back on.

Note

Auto Power Off is disabled (it does not function) when you are using the AC adaptor to power the keyboard.

Power On Alert

Keyboard keys light to alert you if you leave power on and do not perform any operation for about 6 minutes. Note that keys light only, and no sound is produced. When this happens, press any button or keyboard key to clear the power on alert.

Note

Power on alert operates only when you are powering the keyboard using the AC adaptor. It does not operate when you are using batteries.

To disable Auto Power Off and power on alert

Hold down the TONE button while turning on the keyboard to disable Auto Power Off and power on alert.

When these functions are turned off, the keyboard does not turn off automatically and no alert is performed no matter how long it is left with no operation being performed.

Auto Power Off and power on alert are enabled again when you manually turn off power and then turn it back on again.

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Casio LK-40 manual Power On Alert, To disable Auto Power Off and power on alert

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.