Parts Replacement
19
MLC Replacement (Optional)
Tools required
:
1
/
8
" hex wrench,
5
/
16
"
nut driver, and flathead screwdriver
The Multi-Line Controller (MLC)
receives signal from the primary
controller and distributes it to the
modules. Ribbon cables run from
the module connectors on the
MLC to the first modules in each
row via ribbon cables. The power
supply nearest the MLC will provide
its power via a transformer in the
enclosure with the MLC.
1.
Turn off power to the display.
2.
Remove the module directly in
for the approximate location.
3.
Disconnect the input cables.
4.
Remove all ribbon cables,
labeling the module number
as they are removed to ensure
proper replacement.
5.
Remove the six nuts holding the
board in place using a
5
/
16
" nut
driver.
6.
To install the new MLC, move the
unit into place and replace the
six nuts holding it to the display
back. Reconnect input and
ribbon cables. Turn on power,
observing the boot-up sequence.
Note that the LEDs to the right
of the fiber jacks are on; DS23 to
the left of the fiber cable should
be off. Refer to
for more information.
Figure 13:
Multi-Line Controller (MLC)
