Roland Prelude 用户手册

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Troubleshooting
This section provides points to check and actions to take when the Prelude does not function as you expect. Refer to the appropriate 
section for the problem you are experiencing.
Problem
Check/Solution
Page
Power Does Not Turn On
Is the included AC adaptor/power cord correctly connected to an AC outlet and 
to the Prelude?
• Do not use any AC adaptor and power cord other than the one included. 
Doing so will cause malfunctions.
No Sound from the Prelude
Could the VOLUME knob be turned down?
If playing the keyboard does not produce sound, could Local Switch be turned 
OFF?
• Turn Local Switch ON.
Could pedal operations or MIDI messages (exclusive or volume) received from 
an external MIDI device have lowered the volume?
No Sound from a Specific Part
Could the volume of the Part be turned down?
• Adjust the volume parameters in the PERFORM MIXER screen.
Could you have used the Minus-One function to mute (silence) a specific Part?
Does the MIDI receive channel of the part match the MIDI transmit channel of the 
connected MIDI device?
• Set the MIDI channel of the connected external device to match the 
Prelude.
No Sound from a Connected MIDI 
Device
Are MIDI messages being transmitted?
• Turn MIDI TxRx to a setting other than OFF.
Does the MIDI transmit channel of the Prelude’s keyboard controller section 
match the MIDI receive channel of the connected MIDI device?
• Set the MIDI channel of the connected external device to match the 
Prelude.
The volume level of the instrument 
connected to EXT INPUT is too low.
Could you be using a connection cable that contains a resistor? Use a connec-
tion cable that does not contain a resistor.
Effects Are Not Applied
The reverb and chorus effects for the keyboard parts won’t be applied if their 
amounts are set to 0.
• Check the Effect Send settings.
MFX will apply only to the realtime performance of the part you play by hand 
(the Upper Part or Lower Part). Be aware that MFX will not apply to recorded 
song data.
The Effect Sounds Wrong
Some combinations of Tones and effects may sound different in comparison to 
other Tones.
• Check the Effect Source settings.
Pitch Bend Not Obtained When 
Pitch Bend Lever Is Moved
Could the Pitch Bend Range be set to 0?
• Set the Pitch Bend Range to a value other than 0.
Sound Is Distorted
For some effect or Part volume settings, the sound may distort. Adjust the follow-
ing parameters.
• Volume parameters in the PERFORM MIXER screen
• Amount of reverb or chorus for the Effect Send settings
• Overall volume and volume balance
Could you be applying an effect such as overdrive or distortion which intention-
ally distorts the sound?
Appendices
Prelude_e.book  Page 53  Wednesday, January 14, 2009  2:18 PM