Alesis DEQ830 Service Manual page 45

Final Assembly System Test CON'T
5) Turn VALUE knob clockwise.
(LVL). Stop this test when the last column on the left side (label:
LVL) is displayed.
Verify that the front panel LEDs shows the selected column.
Verify that all the LEDs are on, that they have a consistent
brightness and that they are not flickering.
Problems with this inspection indicates that the unit is
problems with its LED display, and that the DUT has FAILED.
Problems with the VALUE knob not incrementing the column,
indicate that the ENCODER KNOB is failing, and that the DUT has
failed.
Failure of this test indicates that this sub-assembly cannot
continue further testing.
6) Turn VALUE knob clockwise, one position.
Verify that ALL center indicators are on. Verify DIGITAL,
AN ALOG, 48.0, 44.1, REAL TIME ANALYZER indicators.
Verify that all the LEDs are on, that they have a consistent
brightness and that they are not flickering.
Problems with this inspection indicates that the unit is
problems with its LED display, and that the DUT has FAILED.
Failure of this test indicates that this sub-assembly cannot
continue further testing.
7) Turn VALUE knob clockwise.
Stop this test when the last column on the left side (label: 8) is
displayed.
Verify that the front panel LEDs shows the selected column.
Verify that all the LEDs are on, that they have a consistent
brightness and that they are not flickering.
Verify that each number label at the bottom of the column is
cl early visible.
Problems with this inspection indicates that the unit is
problems with its LED display, and that the DUT has FAILED.
Failure of this test indicates that this sub-assembly cannot
continue further testing.
Repeat for left columns 2 through 30
Repeat for RIGHT columns 1 through 8.