Daktronics AF-3180-64-R,A - Manual (Page 40)

4.3 Signal Summary
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, or Client radio into the
display.
2. For multiple face display or a display network, an RS422 Quick connect,
interconnect cable (most typical) or fiber cable relays signal between the
controller of the first display and the controller in the second display.
3. From the controller, the signal then travels over 20-conductor ribbon cables
from the controller (J11 through J16 provides signal out) to J2 on the driver
of the first row of modules in the display.
4. Data exists at J1 and is relayed to J2 of the next driver board and so on,
traveling down the entire row of modules. The drivers use this display data
to control the LEDs.
4.4 Power Summary
The following describes the internal display power routing for the display:
1. Incoming power terminates at the panel board.
2. +12.5VDC power supplies power the modules in a both the monochrome
red and amber displays.
4.5 Display Access
Display access for all 64mm displays is from the front. To open the sign:
1. Locate the four screws that
hold the module in place.
Two are on top of the module
and two are on the bottom of
the module.
2. With a #2 Phillips
screwdriver, loosen the four
screws. The screws are part
of the module and will not be
removed.
3. Interior display components
may be accessed and the
module driver or LED board
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.
• The module screws are tight to create a water resistant seal around the edge
of the module. The module must be firmly seated against the sign to shed
water.
Maintenance and Troubleshooting 4-2