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9
Panel Descriptions
<fig.rearpanel.eps>
1.
DC In Jack
Connect the supplied AC adaptor here (p. 12).
2.
Mic
Mic In Jack
Connect a microphone here (sold separately) (p. 15).
Mic Echo Knob
Adjusts the echo effect applied to the microphone (p. 15).
Mic Volume Knob
Adjusts the microphone volume (p. 15).
3.
Speaker Switch
Turn the MT-90U speakers on and off.
4.
Output L/R Jacks
Here is where you can connect an external instrument,
such as an electric piano, using an audio cable (sold
separately) (p. 54).
5.
Cord Hook
Wrap the AC adaptor cord around this hook. By doing
so, you can avoid placing undue stress on the DC In jack
and prevent the loss of power should you accidentally
pull on the AC adaptor’s cord.
6.
MIDI In Connector
Here is where you can connect an external MIDI device
using a MIDI cable (sold separately) (p. 54).
7.
Start/Stop Jack
Connect the pedal switch (sold separately). Once
connected, you can start and stop song playback using
the pedal (p. 53).
8.
USB Connector
Allows you to connect the MT-90U to a computer using a
USB cable. Once connected, you can receive MIDI data
through your computer.
9.
Grounding Terminal
Depending on the circumstances of a particular setup,
you may experience a discomforting sensation, or
perceive that the surface feels gritty to the touch when
you touch this device, microphones connected to it, or
the metal portions of other objects, such as guitars. This
is due to an infinitesimal electrical charge, which is
absolutely harmless.
However, if you are concerned about this, connect the
ground terminal (see figure) to an external ground.
When the unit is grounded, a slight hum may occur,
depending on the particulars of your installation. If you
are unsure of the connection method, contact your
nearest Roland Service Center, or an authorized Roland
distributor, as listed on the “Information” page.
Do not connect the MT-90U near:
• Water pipes (may result in shock or electrocution)
• Gas pipes (may result in fire or explosion)
• Telephone-line ground or lightning rod (may be
dangerous in the event of lightning)
Rear Panel
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