Mar. 2008 MT-90U 9. Volume Test 12. Mic Test This tests the volume controls. fig.test-Volume-1.eps fig.test-Mic.eps 1. Connect the microphone to Mic In and make settings like those shown below. 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 . Volume: Max fig.test-Volume-2.eps 2. Input vocals via the microphone and verify that sound is heard from the speaker. Mic Volume: Max 2. Turn the Mic Volume control and verify that the value of Mic displayed on the LCD screen changes from 0 to 127 . 3. Press the [ ] button to advance to the next item. fig.test-Volume-3.eps 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 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-Echo.eps fig.test-Volume-4.eps When verification for all volume controls has finished, execution automatically advances to the next item. 1. Connect the microphone to Mic In and make settings like those shown below. Volume: Middle position 10. MIDI Test 2. Input vocals via the microphone and verify that no echo is applied. Mic Volume: Middle position fig.test-MIDI.eps 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. 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. 15. Factory Reset fig.test-FctRst-1.eps 11. Noise Test fig.test-Noise.eps 1. Press the [ ] button to select OK , then press [ ]. fig.test-FctRst-2.eps A factory Reset is executed. 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.
After a short interval, the message Completed appears, then the message End is displayed. Volume: Max Mic Volume: Min fig.test-FctRst-3.eps Mic Echo: Min Noise meter: DIN AUDIO The noise levels are acceptable if at -80 dBm or lower on both the left and right. fig.test-FctRst-4.eps 3. Press the [ ] button to advance to the next item. 2. Switch off the power. 20