Daktronics BA-2009, Руководство пользователя

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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. It also details which
connector pin is wired to each digit
segment and the wiring color code used
throughout the display.
The component locations
drawings in
Section 5.2 specify the driver connectors
controlling the digits. Numbers displayed
in hexagons in the upper half of each digit,
as shown in
Figure 14 , indicate which
connector is wired to that digit. (The lower number in the square indicates nominal
digit size.) The drawings listed at the beginning of this section also indicate digit
designation and specify the harnesses used for each of the digit/driver connections.
Figure 14: Digit Designation
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 the disconnect. 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
The table below lists potential problems with the scoreboard and indicates possible
causes and corrective actions. This list does not include every possible problem, but
does represent some of the more common situations that may occur.
Symptom/Condition Possible Cause
Scoreboard will not light
•
Console not connected or poor connection
•
No power to control console
•
No power to the scoreboard
Garbled display
•
Internal driver logic malfunction
•
Control console malfunction
Digit will not light
•
Black wire to digit broken
•
Poor contact at driver connection.
•
Driver malfunction
Scoreboard Maintenance 5-7
and Troubleshooting