JTS CS-120 Series Manual page 33

4-3-6-1 "Microphone"
Before a conference, examine if the microphones of conferences units are
normal. CU screen will display the currently tested microphone number. In the
meantime, the speaking light and the microphone of the conference unit will be
turned on. The tester can conduct microphone test of the conference unit.
Note: If no conference unit is connected, the user cannot access into this
screen.
a) Press "Previous/Next" button to test all connected conference units.
b) After finishing testing all conference units, press "End" to return to the
parent directory.
4-3-6-2 "CU LCD Test"
Examine if the graphic LCD display of CU is normal by using "CU LCD Test"
of CU. Press "CU LCD Test", and the screen will display lateral spaced lines;
press any button, and the screen will display longitudinally spaced lines;
press any button again, and the screen will become all black. The process
can examine any dead or abnormal pixels. After finishing the test, press any
button to return to the parent directory.
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CS-120 Conference System Product Manual