Daktronics Galaxy AF-3400 20 mm Monochrome/RGB Double-face Displays - Manual (Page 48)

Parts Replacement 40
Controller Replacement
Complete the following steps to remove the controller from the display:
Tools required: 1/8" hex wrench and 3/16" nut driver
1. Turn off power to the display.
2. Remove the module in front of the controller in
the upper left corner of Face A.
3. Disconnect the power plug from power input
jack.
4. Remove all power and signal connections from
the board, carefully pulling them from their
jacks. Label the various cables and wires as
they are removed to insure their proper
replacement.
5. Remove the six screws holding the board in
place using a 3/16" nut driver.
6. Take note of the address of the controller and
set the same address on the replacement
controller.
Controller Address Setting
The rotary switches set the hardware address which the software uses to identify that
particular display (Figure 41). Each controller in a network needs a unique address.
Set the switches by rotating them counter clockwise until the
arrow points to the desired number. The display’s power must be
turned off and then turned back on to activate the test mode or to
change the address.
Note: Setting both rotary switches to address 0 will activate a Test
Mode. Turn the display’s power off and back on to activate
testing.
After testing, set the addresses to numbers other than 0/0 and
reboot. The software does not recognize an address 0.
Figure 40: Typical Controller
Figure 41: Rotary Switches