Daktronics BA-1518-11 Multi-Section Outdoor LED Scoreboard - Manual (Page 54)

quarter-turn. Use a 7 /
32
" nut driver. Turn the top latch clockwise and the bottom latch
counterclockwise. Carefully remove the module and detach the ribbon cables. It may be
helpful to label the cables to know which cable goes to which connector when
reattaching.
To access the controller from the rear of the TNMC, remove the right rear-access panel
from the TNMC by loosening all four of the screws. Slide the access panel up to the
larger keyhole and carefully lift it off the TNMC. Take care not to drop the panel, and
remember that the module controller is attached to the panel.
2. Disconnect power from J2.
3. Remove all power and signal connections from the board. Release "locked" connectors
by squeezing together the tabs, then carefully pulling them from the jack. Label the
cables, indicating which cable was removed from which connector; the labeling will be
helpful when you replace the board.
4. Remove the four nuts holding the board in place.
5. Follow the previous steps in reverse order to install a new controller board.
Modules and Drivers
The module and driver board are a single functional unit.
The LED power supplies are identified as assemblies (refer to Power Supplies, following in this
section). Each power supply unit controls four modules; a power supply assembly (two power
supply units) controls eight modules.
Removing/Changing a Module
To remove module, complete the following steps:
1. The modules are attached to an internal frame called the module mounting panel. Find
the latch-access fasteners (referred to as "latch plugs" on the drawing) on the module.
One is centered below the top row of pixels and one is centered above the bottom row.
2. Unlatch the latch fasteners by turning them a quarter-turn using a 7 /
32
" nut driver. Turn
the top latch clockwise and the bottom latch counterclockwise. Carefully remove the
module and detach the ribbon cables. Label the cables, indicating which cable was
removed from which connector; the labeling will be helpful when you replace the
board.
To access the controller from the rear of the TNMC, remove the right rear-access panel
from the TNMC by loosening all four of the screws. Slide the access panel up to the
larger keyhole and carefully lift it off the TNMC. Take care not to drop the panel, and
remember that the module controller is attached to the panel.
3. If you are accessing the unit from the rear, follow this procedure: While holding onto
the module , push it out and turn it sideways and diagonally so that it will fit through the
opening in the frame. Carefully disconnect the ribbon cables. Once again, label the
cables, indicating which cable was removed from which connector; the labeling will be
helpful when reconnecting.
TNMC Maintenance 9-6