Reference; Troubleshooting - Casio CTK-4000 User Manual

Reference

Troubleshooting

Symptom
Included Accessories
I can't find something that should be here.
Power Requirements
Power will not turned on.
The Digital Keyboard outputs a loud sound and then
suddenly powers down.
The Digital Keyboard suddenly powers down after a
few minutes.
Display
The display keeps going out or are flashing.
On-screen keyboard keys or notes remain on the
display.
Screen contents are visible only from straight ahead. This is dues to production limitations. It does not indicate malfunction.
Sound
Nothing happens when I press any keyboard key.
Nothing happens or notes do not play normally when
I play notes on the left side of the keyboard.
Nothing happens when I start an Auto
Accompaniment.
Nothing happens when I start playback of a built-in
song.
E-70
Action
Carefully check inside all of the packing materials.
• Check the AC adaptor or make sure that the batteries are facing
correctly (page E-8).
• Replace the batteries with new ones or switch over to AC adaptor
power (page E-8).
Replace the batteries with new ones or switch over to AC adaptor
power (page E-8).
This happens when Auto Power Off (page E-9) is triggered.
Replace the batteries with new ones or switch over to AC adaptor
power (page E-8).
A Step Up Lesson is in progress and the Digital Keyboard is waiting
for you to play the next note in the song. To stop this from happening,
cancel the lesson (page E-31).
• Adjust the main volume setting (page E-9).
• Check if something is plugged into
OUTPUT jack) (CTK-5000: PHONES jack) on the back of the
Digital Keyboard.
• If there is no sampled sound in memory, nothing will play if you
press a keyboard key while a tone in the range of 671 to 678 (CTK-
4000: 571 to 578) is selected (page E-18).
• Turn power off and then back on to initialize all keyboard settings
(page E-9).
bm
Press to disable chord input in the accompaniment keyboard area
(page E-37).
• With rhythms 190, and 192 to 200 (CTK-4000: 170, and 172 to
180), nothing will sound until you play a chord on the keyboard. Try
playing a chord (page E-37).
• Check and adjust the accompaniment volume setting (page E-40).
• If there is no user rhythm stored in memory, Auto Accompaniment
will not start when you press
to 210 (CTK-4000: 181 to 190) is selected (page E-42).
• Turn power off and then back on to initialize all Digital Keyboard
settings (page E-9).
• It takes a little time after you press the button until the song starts to
play. Wait for a moment for the song to start.
• Check and adjust the song volume (page E-28).
• If there is no user song stored in memory, song playback will not
bl
start when you press
selected (page E-28).
• Turn power off and then back on to initialize all Digital Keyboard
settings (page E-9).
em (CTK-4000: PHONES/
bl
while a rhythm in the range of 201
while a song in the range of 153 to 162 is