Daktronics BA-1018-11, Installation, Maintenance, And Specifications Manual

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8.4 LED Drivers
Reference Drawings:
16 Column LED Driver II Specifications ................................................. Drawing A-134371
8 Column LED Driver II Specifications .................................................. Drawing A-134372
In the scoreboard, the task of switching digits on and off is performed by the LED drivers (refer to
Drawings A-134371 and A-124372 ).
Each driver has up to19 connectors providing power and signal inputs to the circuit, and outputs to the
digits and indicators. The connectors function as follows:
8-Column LED Driver
Connector No. Function
1 – 8 Output to digits and indicators
17 Controls power/signal
16-Column LED Driver
Connector No. Function
1 – 16 Output to digits and indicators
17 Controls power/signal
Output connectors 1 through 16 each have nine pins. Pin 7 provides power (hot) to the digit or
indicators wired to that connector. The other eight pins provide switching connections.
8.5 Segmentation and Digit Designation
Reference Drawing:
Segmentation, 7 Segment Bar Digit ......................................................... Drawing A-38532
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 4 specify the driver connectors controlling the digits.
Numbers shown in hexagons in the upper half of each digit indicate which connector is wired to that
digit.
8.6 Power-On Self-Test
Reference Drawings:
Outdoor LED Power-Up Self Test .......................................................... Drawing A-133350
LED Bar Digit Power Up Self Test.......................................................... Drawing A-133351
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.
Scoreboard Maintenance 8-3
and Troubleshooting