Alesis DEQ224 Service Manual page 31

8) Press the DOWN button.
Verify that the Channel A signal AND clip LEDs light, and that
when the button is held, that the LED pattern is in working
order as in the Front Panel Sub Assembly Test.
Problems with no response or flickering LEDs indicates poor or
failed mechanical fit for the switch, and the test has FAILED.
Problems with the appearance of the LEDs also indicates the
test has FAILED.
Failure of this inspection indicates that the DUT cannot
continue further testing.
9) Press the UP button.
Verify that the Channel B signal AND clip LEDs light, and that
when the button is held, that the LED pattern is in working
order as in the Front Panel Sub Assembly Test.
Problems with no response or flickering LEDs indicates poor or
failed mechanical fit for the switch, and the test has FAILED.
Problems with the appearance of the LEDs also indicates the
test has FAILED.
Failure of this inspection indicates that the DUT cannot
continue further testing.
10) Press the BYPASS button.
Verify that the Bypass LED lights, and that the LED pattern is
in working order as in the Front Panel Sub Assembly Test.
Problems with no response or flickering LEDs indicates poor or
failed mechanical fit for the switch, and the test has FAILED.
Problems with the appearance of the LEDs also indicates the
test has FAILED.
Failure of this inspection indicates that the DUT cannot
continue further testing.
11) Press the CHANNEL/EXIT button.
Verify that the Link A/B LEDs light, and that the LED pattern
is in working order as in the Front Panel Sub Assembly Test.
Problems with no response or flickering LEDs indicates poor or
failed mechanical fit for the switch, and the test has FAILED.
Problems with the appearance of the LEDs also indicates the
test has FAILED.
Failure of this inspection indicates that the DUT cannot
continue further testing.