Roland MT-90U 用户手册
59
Troubleshooting
Problem
Cause / Solution
Page
Cannot turn the power on.
Are the AC adaptor and power cord connected?
Cannot hear any sound from the
MT-90U.
MT-90U.
Is the volume knob turned all the way to the left?
Are headphones connected?
Is the speaker switch turned off?
Is the MT-90U correctly connected to the external device?
Are all the devices turned on?
Has the volume been lowered to “0” with the remote control?
Notes drop out.
The maximum polyphony of the MT-90U is 128 notes. When performing
with a song or when using the pedal a lot during a performance, the
number of notes being expressed at any one moment may exceed 128.
When the total exceeds 128 notes, then some will be omitted.
with a song or when using the pedal a lot during a performance, the
number of notes being expressed at any one moment may exceed 128.
When the total exceeds 128 notes, then some will be omitted.
The song doesn’t play.
Is the track button’s indicator on?
Tracks do not play when the track indicator is not lit. Press the track button
so the indicator is lit.
Tracks do not play when the track indicator is not lit. Press the track button
so the indicator is lit.
Is the music file in an MT-90U supported file format?
The song doesn’t play
immediately.
immediately.
SMF data has two formats, format 0 and format 1. If the data is in format
1, it may take some time until the song plays. To determine the type of
format you are using, see the documentation that came with the data.
1, it may take some time until the song plays. To determine the type of
format you are using, see the documentation that came with the data.
Certain instrument sounds are
missing.
missing.
Is the song set to play only specific parts?
Is Center Cancel turned on?
Cannot rewind or fast forward.
You cannot rewind or fast forward while the MT-90U is reading data from
the USB memory.
the USB memory.
If the song’s file size is very large, you may not be able to rewind or fast
forward.
forward.
Cannot return to the beginning of
the song even after pressing
the song even after pressing
[
(Reset)].
Some music files contain data that may be set to stop in the middle of the
song. Such files return to the set stop point when you press [
(Reset)].
However, if you continue to press [
(Reset)] a number of times, the
song will return to the beginning.
The song goes out of tune or the
pitch drifts.
pitch drifts.
Has the song been transposed?
Are the tuning settings set appropriately?
The track buttons aren’t working.
Is the 16 track screen on the display?
When the 16 track screen is shown, the track buttons do not work.
When the 16 track screen is shown, the track buttons do not work.
The pedal doesn’t work or is
stuck.
stuck.
Is the pedal connected correctly?
Connect the pedal to the Start/Stop jack on the rear panel.
Connect the pedal to the Start/Stop jack on the rear panel.
The lyrics aren’t displayed
properly on the screen.
properly on the screen.
Some music files don’t contain lyric data, so they don’t display lyrics.
Change the lyric display language and the lyrics may appear normally.
Try displaying the lyrics again. Press [
(Song)] while the lyrics are
displayed and lyric display is cancelled. Press [
(
Play) to display the
lyrics again.
Cannot use the metronome, count
in, part, mute, or solo functions.
in, part, mute, or solo functions.
You cannot use these functions when playing audio data.
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