wiring for the models described in this manual. Refer to Section 5 for a complete
listing of scoreboards and the appropriate schematic.
8.4 LED Drivers
Reference Drawings:
Address Table, 1 Through 128 ........................................... Drawing A-115078
Specifications; LED Driver III, 16 Col ................................. Drawing A-288137
Address Table 1; GEN IV Driver Address DIP Switch ....... Drawing A-290261
Driver Enclosure Reference, GEN IV ................................. Drawing A-293354
In the scoreboard, the LED drivers perform the task of switching digits on and off.
Refer to Drawing A-293354. Each driver has up to 19 connectors providing power
and signal inputs to the circuit and outputs to the digits and indicators. The
connectors function as follows:
16-Column LED Driver
Connector No. Function
1-16 Output to digits and indicators
17 Power and signal input
18 Relay
19 or S1 Address
20 Protocol
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.
For the scoreboard to receive signal and function properly, the driver must be set to the correct
address. This address is set with jumper wires in a 12-pin plug which mates with a jack on the
driver. Drawing A-288137 details the specifications for 16-column drivers.
Address settings can be configured by using the SI dip switch. See Drawing A-290261 for more
information. The older method using the J19 address plug is still available. Refer to Drawing A-
115078 for a listing of the wire/pin connections for driver addresses 1 – 128.
8.5 Segmentation and Digit Designation
Reference Drawing:
Segmentation, 7 Segment Bar Digit ............................... Drawing A-38532
Scoreboard Maintenance 8-5
and Troubleshooting
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