TNMC and Electronic Caption Troubleshooting
14
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 statistic 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
S2
DIP switch package on the main scoreboard driver sets the display driver address.
Refer to
DWG-284773
in
Appendix C
for the location and functions of the
S2
DIP switch.
• For TNMCs, switches 1-4 of
S2
are set to OFF, which equals address 221. With Switch 5
off, Home information is displayed. With Switch 5 on, Guest information is displayed.
• For electronic captions, a typical Player-Foul-Points display uses address 223, with
Switch 2 and Switch 5 both on.
Component Locations and 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.
Replacing a Component
Display modules consist of LEDs embedded in a circuit board. One or more circuit boards
are mounted to the back of a display face panel. Do not attempt to remove individual
LEDs. In the case of malfunctioning LEDs, replace the entire module circuit board.
1�
Access the internal components as described in
Component Locations and Access
.
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 or
take a picture 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 must be removed 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 verify the issue has been resolved.
for display assembly, showing the power supply, driver, and modules.
Note:
When replacing power supplies built after April 2016, the replacement power
supply will come attached to a mounting plate that mounts to the existing power
supply bracket.
