Casio CTK720AD User Guide - Page 35

Troubleshooting Problem No keyboard Sound Any of the following symptoms while using battery power. 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. Low battery power 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. Set the POWER/MODE switch to the NORMAL position. 3. Use the MAIN VOLUME 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. Replace the batteries with a set of new ones or use the AC adaptor. See page Pages E-12, 13 Page E-15 Page E-15 Page E-15 Pages E-12, 13 • 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 Auto Accompaniment does not sound. On-screen keyboard guide keys stay on. When playing with another instrument, keys or tunings do not match. Static noise when a microphone is connected. No microphone sound After transferring song data from my computer, playback stops part way through. A tone's quality and volume sounds slightly different depending where it is played on the keyboard. Accompaniment volume is set to Use the SETTING button to increase the Page E-28 00. volume. Keyboard is waiting for play of the correct note during Step 1 or Step 2 play. 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. Pages E-25, 26 Pages E-25, 26 Transpose or tuning is set to a value other than 00. Use the SETTING button to display the applicable setting screens and set both transpose and tuning to 00. Pages E-28, 29 1. Use of a microphone that is a different from the type that is recommended. 2. Use of the microphone in the vicinity of fluorescent lighting. 1. Use a recommended type microphone. 2. Move the microphone away from source of the static. Page E-16 Page E-16 1. Microphone volume setting is too low. 2. Microphone ON/OFF switch is set to OFF. 1. Increase the microphone volume setting. 2. Change the microphone ON/OFF switch setting to ON. Page E-16 Page E-16 Digital noise from the USB cable or power cord caused data communication between your computer and keyboard to be interrupted. Stop playback, disconnect the USB cable from and then reconnect it to the keyboard's USB port, and then try playing back the tune again. If this does not correct the problem, exit the MIDI software you are using, and then disconnect the USB cable from and then reconnect it to the keyboard's USB port. Next, restart your MIDI software and try playback again. Page E-31 This is an unavoidable result of the digital sampling process,* and does not indicate malfunction. * Multiple digital samples are taken for the low range, middle range, and high range of the original musical instrument. Because of this, there may be a very slight difference in tonal quality and volume between sample ranges. 628A-E-035A E-33