Daktronics Galaxy AF-3200 Series, Manual

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4.2 Display Access
Maintenance and Troubleshooting
4-2
Display access for 89mm displays is
normally from the front. To open the sign:
1. Locate the latch access fastener on
the module. It is centered on the
right side of the module.
2. With a #2 screwdriver, apply
pressure to latch and turn it
counter-clockwise. The module
door will swing open to the left.
3. Interior display components may be
accessed and the pixel strips may
be removed.
When closing a display, reverse the previous
steps and take note of the following points:
•
The weather-stripping on the back
edge of the module is intact and in good condition for preventing water
from seeping into the sign.
Figure 18: Opening the Display
•
The module latches are fully engaged to create a water resistant seal around
the edge of the module. The module
must be firmly seated against the sign
when the latches are fully engaged.
4.3 Signal Summary
Reference Drawings:
Schematic, AF-3400-(8-48X32-112)-89-Mono-*-* ....... Drawing A-177829
The signal routing for the display can be summarized as follows:
1. Data from the controller computer, which runs Venus
®
1500 software,
travels via RS232, RS422, modem, fiber optic cable, radio, or Ethernet
signal into the display.
2. From the controller, the signal then travels over a 20-conductor ribbon
cables from the controller (J11 through J16 provides signal out) to J2 on the
driver of the first column of modules in the display.
3. Data exists at J1 and is relayed to J2 of the next driver board and so on,
traveling down the entire row of modules.
4. For multiple face display or a display network, an RS422 (most typical) or
fiber cable relays signal between the controller of the first display and the
controller in the second display.
Note: The RS422 interconnection is not allowed when the input to the first
display is Ethernet.
5.
Refer to Drawing A-177829 and Figure 19 for further information. The
drivers use this display data to control the LEDs.