Daktronics CR-2004, Display Manual, Page: 30 / 90

24 Scoreboard Troubleshooting
Note: If the panel is not held in place when the screws are removed, it could drop
and possibly damage LEDs or the digit harness.
With a non-digit access panel, simply remove the top, side and bottom screws holding it in
place. Some panels are hinged and swing open when the screws are removed or loosened.
Rear access panels can be lifted up and out over the screws through keyholes.
Note: When closing the access panel, make sure all latches/screws are holding the door
firmly in place to prevent moisture and debris from entering the scoreboard.
5.3 Component Locations
Refer to Drawing B-327249 in Appendix A . Drivers and power and signal components are
typically mounted inside the scoreboard behind a digit or access panel.
5.4 Replacing Digits & Indicators
LEDs are embedded in a circuit board that is mounted to the back of the digit panel, as
shown in
Figure 16 . Do not attempt to remove individual LEDs. In the case of a
malfunctioning LED or digit segment, replace the entire circuit board.
To replace a digit or indicator circuit board:
1. Open the digit panel as described
in
Section 5.2 .
2. Disconnect the power/signal plug
from the back of the circuit board
by squeezing together the locking
tabs and pulling the connector free.
3. Use a
9
/
32
" nut driver to remove the
nuts securing the circuit board to
the inside of the panel, and then lift
it off the standoff studs.
4. Position a new circuit board over
the studs, making sure the rubber
side of the rubber-backed spacer is
facing the circuit board.
5. Tighten the nuts.
6. Reconnect the power/signal
connector.
Note:
This is a keyed connector and it will attach in one way only. Do not attempt to
force the connection.
7. Close and secure the digit panel, then power up and test the scoreboard to see if
changing the digit or indicator has resolved the problem.
Figure 16: Digit Assembly