Optimus 410 ユーザーズマニュアル

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TROUBLESHOOTING
If your Concertmate 410 is not performing as it should, these suggestions might
help. If you still cannot solve the problem, take the keyboard to your local Ra-
dioShack store for assistance.
Symptom
Possible Cause
Remedy
No sound, even if 
keys are pressed.
POWER
 is set to 
OFF
.
Set 
POWER
 to 
ON
.
VOLUME
 is turned down.
Turn up 
VOLUME.
Headphones are con-
nected.
Unplug headphones.
Power supply problem.
Check the power supply.
• Ensure batteries are 
installed correctly.
• Ensure batteries are 
fresh.
• Check for correct AC/
DC adapter connection.
No rhythm.
VOLUME
 is turned down.
Adjust 
VOLUME.
Rhythm was not started.
Press 
START
/
STOP
.
No accompaniment 
when accompani-
ment keys are 
pressed.
VOLUME
 is turned down.
Adjust 
VOLUME. 
Accompaniment button 
not pressed.
Press 
A.B.C
.
No sound when con-
nected to an exter-
nal amplifier.
POWER
 is set to 
OFF
.
Set 
POWER
 to 
ON
.
VOLUME
 is turned down.
Turn up 
VOLUME.
Defective connection 
cord.
Replace the connection 
cord.
Problem with external 
amplifier.
Check the external ampli-
fier.
42-4031.fm  Page 20  Wednesday, August 11, 1999  4:22 PM