Daktronics Galaxy Series, Руководство пользователя

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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 into the
display.
2. For multiple face displays or a display network, an RS422 interconnect
cable (most typical) relays signal between the controller of the first display
and the controller in the second display. Fiber cables can also be used.
3. From the controller, the signal then travels over 20-conductor ribbon cables
from the controller (J11 through J16 provide signal out) to J2 on the driver
of the first column 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. This display data is used to
control the LEDs.
4.3 Power Summary
Reference Drawings:
Schematics .............................................................. Refer to Appendix A
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. The transformer steps down the power to
approximately 10 VAC.
3. Depending on pixel count and color, power supplies (6.5VDC, 9VDC, or
11VDC) are used to power the modules. Power supplies are preset. Contact
Daktronics Customer Service for the proper settings.
4. Monochrome or tri-color Galaxy displays can use red, amber, or red and
green LEDs. See your display
Schematic for power supply wiring
information.
•
Each 9VDC power supply provides power to eight modules in a display
that uses 3 LEDs per pixel. In those displays that have 4 monochrome
LEDs per pixel, 11VDC power supplies provide power to four
modules.
•
As a standard, red displays use 3 LEDs per pixels, amber displays use 4
LEDs per pixel, and red/green displays use 2 red and 2 green LEDs per
pixel.
•
Tricolor RG displays use two different power supplies for each of the
eight modules. The 6.5VDC power supplies power the red LEDs and
the 9VDC power supplies provide power for the green LEDs.