Factory Reset - Roland MT-90U Service Notes

Mar. 2008
9. Volume Test
This tests the volume controls.
fig.test-Volume-1.eps
1.
Turn the Mic Echo control on the rear panel and verify that the value of
Echo displayed on the LCD screen changes from 0 to 127.
fig.test-Volume-2.eps
2.
Turn the Mic Volume control and verify that the value of Mic displayed
on the LCD screen changes from 0 to 127.
fig.test-Volume-3.eps
3.
Turn the Volume control on the front panel and verify that the value of
Master displayed on the LCD screen changes from 0 to 127.
fig.test-Volume-4.eps
When verification for all volume controls has finished, execution
automatically advances to the next item.
10. MIDI Test
fig.test-MIDI.eps
1.
Connect the MIDI keyboard to MIDI IN on the rear panel, play the
keyboard, and verify that the MT-90U produces sound.
2.
Press the [ ] button to advance to the next item.
11. Noise Test
fig.test-Noise.eps
1.
Connect the noise meter to the Output jack on the rear panel.
2.
Make settings like those shown below, then measure the noise level on
both the left and right.
Volume: Max
Mic Volume: Min
Mic Echo: Min
Noise meter: DIN AUDIO
The noise levels are acceptable if at -80 dBm or lower on both the left and
right.
3.
Press the [ ] button to advance to the next item.
20
12. Mic Test
fig.test-Mic.eps
1.
Connect the microphone to Mic In and make settings like those shown
below.
Volume: Max
Mic Volume: Max
2.
Input vocals via the microphone and verify that sound is heard from the
speaker.
3.
Press the [ ] button to advance to the next item.
13. Phase Test
This test is required only at the time of shipment from the factory. Press the
[ ] button to advance to the next item.
14. Echo Test
fig.test-Echo.eps
1.
Connect the microphone to Mic In and make settings like those shown
below.
Volume: Middle position
Mic Volume: Middle position
2.
Input vocals via the microphone and verify that no echo is applied.
3.
Increase the Echo level to Max.
4.
Input vocals via the microphone and verify that echo is applied.
5.
Press the [ ] button to advance to the next item.

15. Factory Reset

fig.test-FctRst-1.eps
1.
Press the [ ] button to select OK, then press [
A factory Reset is executed.
fig.test-FctRst-2.eps
After a short interval, the message Completed appears, then the message
End is displayed.
fig.test-FctRst-3.eps
fig.test-FctRst-4.eps
2.
Switch off the power.
MT-90U
].