Daktronics BA-1018-11, Инструкция по установке, эксплуатации и техническим характеристикам

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3. If you are accessing the unit from the rear, follow this procedure: While holding onto
the module, push it out and turn it in such a manner (generally a sideways, diagonal
turn) that it will fit through the frame opening. Then pull the module back through the
opening in the fame. 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.
When installing a module, reverse the previous steps and take note of the following points:
l
Weatherstripping on the back edge of the module must be intact and in good condition
if it is to prevent water from seeping into the display.
l
Module latches must be fully engaged to create a watertight seal around the edge of the
module. The module should be firmly seated against the display when the latches are
fully engaged.
Each module assembly contains a module housing (containing LEDs and the driver board) and
a louver assembly.
Drawings B-126111 and B-126112 illustrate the various module
components.
From time to time, it may become necessary to remove one or more parts from the module
housing for repair or replacement. The following subsection explains how to disassemble a
module.
Removing the Louver Assembly
Damaged louvers may reduce the brightness and contrast of this display. If any of the louvers
on the display are broken or damaged, replace the entire louver assembly. Refer to the
Replacement Parts List in
Section 9.9 . When replacing the louver assembly, take care not to
strip the plastic twist-on fasteners.
Removing/Changing a Louver
Complete the following steps to remove the louver assembly from the face of the module.
1. See the directions above in the Module and Drivers subsection for information on
how to access the louver from the front or rear.
2. Remove the five twist-on fasteners holding the louver assembly to the module with an
11
/
32
" nut driver.
3. Lift the louver assembly straight away from the module.
Power Supplies
The LED power supplies are identified as assembly 0A-1213-4013 in the component location
drawings.
Removing/Changing a Power Supply
Complete the following steps to remove a power supply from the display:
1. See the directions in the preceding Module and Drivers subsection for information on
how to access the component from the front or rear.
2. Disconnect all the wires connected to the power supply.
3. Remove the hardware holding the power supply in place to free the unit.
4. Follow these steps in reverse order to install a new power supply.
9-6 TNMC Maintenance