Daktronics Galaxy AF-3500/3550 - Manual (Page 31)

Parts Replacement 27
Controller Address Setting
The rotary switches set the hardware address which the software uses
to identify each particular display. Each controller in a network needs a
unique address.
To set the rotary address switches, rotate them until the arrow points to
the desired number, as shown in
Figure 23. The display’s power must be
turned off and then turned back on to activate the test mode or to change
an address.
Notes:
• Setting both rotary switches to address 0 will activate Test Mode.
Turn the display’s power off and back on to activate testing.
• After testing, reset the rotary switches to an address other than 0/0
and repower the controller (the software will not recognize an address of 0).
MLC Replacement
Tools required: 1 /
8
" hex wrench, 5 /
16
" nut driver,
and flathead screwdriver
In mirror displays, 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 front
of the MLC. Refer to Figure 10 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
Figure 19 and Figure 24 for more information.
Note: Ensure all dip switches on the MLC are in the down position.
Upper Lower
Address 1
0 – 1
Address 2
0 – 2
0 1 2
3
4
5
6 7
8 9 A
B
C
D
E
F
0 1 2
3
4
5
6 7
8 9 A
B
C
D
E
F
0 1 2
3
4
5
6 7
8 9
A
B
C
D
E
F
0 1 2
3
4
5
6 7
8 9 A
B
C
D
E
F
0 1 2
3
4
5
6 7
8 9 A
B
C
D
E
F
0 1 2
3
4
5
6 7
8 9 A
B
C
D
E
F
Address 16
1 – 0
Figure 23: Rotary Address Switches
Power
7-24 VDC
Program
Module 7
Module 6
Module 5
Module 4
Module 3
Module 2
Module 1
Module 0
Fiber
In
Fiber
Out
Module
Connectors
Fan
Control
Figure 24: Multi-Line Controller