Daktronics Galaxy AF-3165, Manual

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Maintenance and Troubleshooting
38
The controller contains one jumper (X1) for use with a modem system. The jumpers must jump both
pins for a modem system.
Complete the following steps to remove the controller from the display.
1. Disconnect power from J5.
2. Remove all power and signal connections from the board. “Locked” connectors are released
by squeezing together the tabs, then carefully pulling them from the jack. When replacing the
board, it is helpful to have the cables labeled as to which was removed from which connector.
3. Remove each of the six nuts holding the board in place.
4. 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. Each power supply unit controls four modules; a power supply assembly (two power
supply units) controls eight.
To remove a module, complete the following steps:
1. Locate the latch access fasteners on the module. One is centered below the top row of pixels
and one is centered above the bottom row.
2. With a 1/8"Allen wrench, turn the latch access fasteners a quarter turn as seen in Figure 37 on
the following page. The top one should be turned clockwise and the bottom one counter-
clockwise.
3. Pull the display module far enough to reach around the back and disconnect the ribbon cables.
When installing a module, reverse the previous steps and take note of the following points:

The weather-stripping 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.

The 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 is made up of a module housing (containing LEDs and the driver) 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 sub-sections explain how to disassemble a module.