Daktronics Tuff Sport Indoor LED Scoreboards - Manual (Page 25)

TNMC & Electronic Caption Troubleshooting & Maintenance 19
3.4 Power & Signal Summary
Refer to Drawing B-1132254 or B-1133209 in Appendix B for detailed schematics about
display power and signal routing.
Display signal routing can be summarized as follows:
1. Data from the All Sport ® controller (or DakTennis™ software) travels via signal cable
(or radio) into the scoreboard.
2. The signal then travels through the driver, typically re-driven from the driver TB-31 to
the current loop interface (CLI) cards located on the right-hand module of each display
and then to the first LED module via ribbon cable.
3. The signal relays from module to module via ribbon cable in daisy-chain style until it
reaches the last module in the display.
Display power routing can be summarized as follows:
1. Incoming power from the power cord terminates at the main scoreboard LED driver tray.
2. Using interconnect harnesses, the power for TNMCs is passed from the driver tray to
the Home display power supply, and then to the Guest display power supply. In stat
display electronic captions, each power supply receives power from a separate driver.
3. Power from the power supplies is relayed to all display modules.
4. The modules draw their power directly from the power supply assemblies; the
display driver receives power out from the first module via ribbon cable.
3.5 Component Locations & Access
To access the internal components of the display, simply remove the screws on either side
of the face panel that secure it to the scoreboard. Carefully remove the face panel from
the scoreboard, as there will be several cables connected to it. Drawings B-1130367 and
B-1130784 in Appendix C provide a detailed view of each display component and the
connections between them.
3.6 Replacing a Component
1. Access the internal components as described in Section 3.5.
2. Disconnect all power/signal cables from the component by squeezing together the
locking tabs and pulling the connectors free. It may be helpful to label the cables to
know which cable goes to which connector when reattaching.
3. Remove the hardware securing the component to the display face panel.
Note: In order to replace the right-most module circuit board (when viewing the
display from the front), the power supply bracket and driver circuit board must be
removed from it first.
4. Position a new component on the display face panel and tighten the hardware.
5. Reconnect all power/signal connectors.
6. Power up and test the scoreboard/display to see if the problem has been resolved.
Refer to Figure 17 for display assembly, showing the power supply, driver, and modules.