Daktronics TN-2501 Tuff Sport Indoor LED Tennis Scoreboard - Manual (Page 13)

Electrical Installation 7
Section 3: Electrical Installation
CAUTION: Only qualified individuals should access the electrical components of the display and its
associated equipment. It is the responsibility of the electrical contractor to ensure that all electrical
work meets or exceeds local and national codes.
Daktronics engineering staff must approve all changes or the warranty will be void.
3.1 Power
Single-court scoreboards feature a 120 VAC power cord with a three-prong plug. Install a
grounded receptacle near the equipment so that the power cord can easily reach it.
Each court section of multi-court scoreboards includes two 120 VAC power cords: one for
Power In and one for Power Out. Install grounded receptacles for each row of scoreboards so
that the power cord of the left-most scoreboard section (when viewed from the front) can
easily reach it. Connect the Power In cords to the Power Out cords between sections moving
from right to left. Be sure to plug the whole row of scoreboards into the power receptacle last.
Note that the top-left section (HOME team score) will only have one power cord.
Displays operating on 240 VAC are also available, and they are shipped equipped with
universal power plugs.
Grounding
Connect the scoreboard to earth ground. Proper grounding assures reliable equipment
operation and protects the equipment against damaging electrical disturbances and lightning.
Daktronics recommends a resistance-to-ground of 10 ohms or less. The electrical contractor
performing the electrical installation can verify ground resistance. Daktronics Sales and
Service personnel can also provide this service. The grounding connection on the power
cord’s three-prong plug connects to the shell of the scoreboard.
Note: The customer must properly ground the outlet according to local and national codes.
Failure to ground the outlet voids the warranty for the scoreboard.
3.2 Power-On Self-Test (POST)
The scoreboard performs a self-test each time that power is turned on and the control console
is powered off or not attached to the scoreboard. If the control console is attached and
powered on, the self-test does not run, and data from the control console is displayed on the
scoreboard after a brief period of time. Each scoreboard self-test pattern will vary depending
on the scoreboard model, the number of drivers and types of digits. Figure 9 shows an
example of the LED bar test pattern that each digit performs.
Figure 9: Digit Segment POST