Troubleshooting - Casio CTK-491 User Manual

Troubleshooting

Problem
No keyboard Sound
Any of the following symptoms
while using battery power.
• Dim power indicator
• Instrument does not turn on
• Display that is flickering,
dim, or difficult to read
• Abnormally low speaker/
headphone volume
• Distortion of sound output
• Occasional interruption of
sound when playing at high
volume
• Sudden power failure when
playing at high volume
• Flickering or dimming of the
display when playing at high
volume
• Continued sound output
even after you release a key
• A tone that is totally different
from the one that is selected
• Abnormal rhythm pattern
and Song Bank play
• Loss of power, sound distor-
tion, or low volume when
playing from a connected
computer or MIDI device
<CTK-491 only>
• Distortion of microphone in-
put
• Dim power supply indicator
when a microphone is used
• Sudden power failure when
using the microphone
Auto Accompaniment does not
sound.
The key or tuning does not
match when playing along with
another instrument.
E-34
CTK481_E34_37.p65
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
Auto accompaniment volume is set to
0.
The tuning or transpose parameter is
set to a value other than 0 or 00.
Page 34
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 buttons 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.
Use the ACCOMP VOLUME button to
increase the volume.
Change the transpose or tuning pa-
rameter value to 0 or 00.
03.10.7, 2:58 PM
Adobe PageMaker 6.5J/PPC
See page
Pages E-13, 14
Page E-16
Page E-16
Page E-16
Pages E-13, 14
Page E-21
Pages E-29, 30
625A-E-036B