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Maintenance and Troubleshooting
5-5
5.5 Segmentation and Digit Designation
Reference Drawings:
Segmentation, 7 Segment Bar Digit .............................. Drawing A-38532
Digit Designation; TN-2018-11 or -21 .......................... Drawing A-182059
Pre-Paint Assy, TN-2032-11 or -21 ............................. Drawing B-183613
Component Locations, TN-2011-11/-21 ...................... Drawing A-188217
Component Layout, TN-2037-11/-21 ........................... Drawing A-193974
Component Locations; TN-2029-11/21 ....................... Drawing A-221340
Component Locations; TN-2042-11/21 ....................... Drawing A-259122
In each digit, certain LEDs always go
on and off together. These groupings
of LEDs are referred to as
segments.
Drawing A-38532 illustrates digit
segmentation. The drawing also details
which connector pin is wired to each
digit segment and the wiring color
code used throughout the display.
Drawings A-182059 , A-188217, A-
221340, B-183613 and B-193974
provide the digit designation
information for the tennis scoreboards.
Numbers displayed in hexagons in the upper half of each digit, as shown in
Figure
10 , indicate the digit designation, that is, which connector is wired to that digit. (The
lower number in the square indicates nominal digit size.)
5.6 Lightning Protection
The use of a disconnect near the scoreboard to completely cut all current-carrying
lines significantly protects the circuits against lightning damage. The National
Electrical Code also requires it. In order for this system to provide protection, the
power
must be disconnected when the scoreboard is not in use. The control console
should also be disconnected from power and from the signal junction box when the
system is not in use. The same surges that may damage the scoreboard’s driver can
also damage the console’s circuit.
5.7 Troubleshooting
Daktronics scoreboards require little maintenance. However, from time to time, a
display may malfunction, and certain display components will have to be repaired or
replaced. The table on the following page provides a list of problems common to
most LED displays and specifies corrective actions.
The Replacement Parts List in Section 5.8 includes part numbers of components it
may be necessary to reorder during the life of your display. Most scoreboard
components have a white label that lists the part number. Refer to the Replacement
Figure 10: Digit Designation