Daktronics Galaxy AF-3155, Manual

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Maintenance and Troubleshooting
4-2
4.2 Signal Summary
The signal routing for the display can be summarized as follows:
1. Data from the control computer, which runs Venus
®
1500 software, travels
via RS232, RS422, modem, fiber optic cable, or radio signal to the primary
display.
2. For multiple face displays or a display network, an RS422 quick connect
cable (most typical) relays signal between the controller of the primary
display and the controller in the secondary display. In the case of fiber, two
fibers would connect from the fiberboard in the primary display to the
fiberboard in the secondary display.
3. From the controller, the signal then travels over one or more 20-conductor
ribbon cables (J11 through J18 provide signal out) to J2 on the driver of the
first row of modules in the display.
4. Data exits 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.
4.3 Power Summary
Reference Drawing:
Schematic; Power Supply Configurations ................... Drawing A-183321
The power routing for the display can be summarized as follows:
1. Incoming power terminates at the power termination enclosure. Before
leaving the enclosure, power is sent through a circuit breaker and an RFI
electrical filter.
2. Power for the controller board passes through a transformer located on the
controller/power panel.
3. The power supplies are set to 5.3 VDC. For assistance with the wiring to the
power supplies see
Drawing A-183321 . Power supplies are preset. Contact
Daktronics Customer Service for the proper settings.