Daktronics AF-3300-12-RGB/20-R - Manual (Page 28)

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, radio signal, or Ethernet to the
signal termination enclosure at the primary display.
2. From the signal enclosure, signal is sent to the primary display via a quick
connect cable, which connects to the quick connect input board.
3. From the quick connect input board, the signal is transferred to the display’s
controller via a 20-conductor ribbon cable.
4. From the controller, the signal then travels over one or more 20-conductor
ribbon cables (J11 through J18 provide signal out) to J1 input on the driver
of the first row of modules in the display.
5. Data exits at J2 output and is relayed to J1 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.
6. On the primary display, in a primary-mirror (2V) configuration, the output
leaves the J2output on the last column of modules via a 20-conductor
ribbon cable and connects to one or more 31-pin quick connect output
boards.
7. A quick connect interconnect cable transfers data from the primary to the
mirror display.
8. The 31-pin quick connect input board on the mirror display receives the
signal and transmits it to J1 on each row of the first column of modules, via
a 20-conductor ribbon cable
9. Data exits at J2 and is relayed to J1 of the next driver board and so on,
traveling down the entire row on modules in the mirror face- this display
data is used to control the LEDs on this face.
10. The data displayed on the mirror face will be the same as that displayed on
the primary face.
4.3 Power Summary
Reference Drawing:
Schem, AF-3300-48x64-12-RGB/32x80-20-R,P/M....... Drawing B-242469
Shcem, AF-3300-48x48-12-RGB/32x48-20-R, P/M ..... Drawing B-242471
The power routing for the display can be summarized as follows:
1. Power terminates at the power J-box on the back of the display
2. Wires are pre-terminated from there to the power termination box in the
display
3. Before leaving the enclosure, power is sent through a circuit breaker and an
RFI electrical filter or filters
4. Power for the controller board passes through a transformer located in the
power termination box