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Front Panel Sub Assembly Test CON'T
7)
In order, press Band Button 4 through Band Button 60.
Verify that when the button is held, that the column above the
button lights, that the number corresponding to the button is shown in the
seven-segment display, and that when the button is held, that the LEDs
that are on do not flicker.
Verify that when the seven-segment display shows the button number,
that the display does not flicker, and that all the LEDs for the appropriate
number are lit, and that no extra segments are lit.
Problems with no response or flickering LEDs indicates poor or failed
switch, and the test has FAILED. If there seems to be a problem with the
numbers displayed in the seven-segment display, then the display has also
FAILED.
Failure of this inspection indicate that the DUT cannot continue further
testing.
8)
Press the DOWN button.
Verify that the Channel A signal AND clip LEDs light, and that
when the button is held, that the LEDs that are on do not flicker.
Problems with no response or flickering LEDs indicates poor or failed
switch, OR failed LED. Be sure to verify that BOTH LEDs turn on at the
same time. Either type of problem indicate the test has FAILED.
Failure of this inspection indicate 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 LEDs that are on do not flicker.
Problems with no response or flickering LEDs indicates poor or failed
switch, OR failed LED. Be sure to verify that BOTH LEDs turn on at the
same time. Either type of problem indicate the test has FAILED.
Failure of this inspection indicate that the DUT cannot continue further
testing.
Confidential
Alesis Service Manual
8-31-0103-A
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