34 Scoreboard Troubleshooting5.10 Trumpet HornsFor scoreboards that include clocks and have trumpet horns installed, refer to the TrumpetHorn Installation Manual ED-10006, available online at www.daktronics.com/manuals.5.11 Segmentation and Digit DesignationIn each digit, certain LEDs always go on and off together. These groupings of LEDs are calledsegments. Drawing A-38532 in Appendix A details which connector pin is wired to eachdigit segment and the wiring color code used throughout the display.The component location drawings in Appendix A also specify the driver connectorscontrolling the digits. Numbers shown in hexagons in the upper half of each digit indicatewhich connector is wired to that digit.5.12 SchematicsFor advanced scoreboard troubleshooting and repair, it may be necessary to consult theschematic drawings. These drawings, located in Appendix A, show detailed power andsignal wiring diagrams of internal display components such as drivers and transformers aswell as optional components like TNMCs/electronic captions, radio receivers, and trumpethorns. Use the following tables to determine the driver schematics for a particular model:16 Column Driver (x 1)Model 120 V 240 V TNMCBA-1518BA-1524 A-285779 A-324504Before Sept.2009:A-179790After Sept. 2009:A-75237216 Column Driver (x 2)Model 120/240 V & TNMC White Digits & TNMCFB-2018FB-2019FB-2020SO-2018SO-2019 B-298205B-930720FB-2021FB-2022FB-2023SO-2021SO-2022SO-2023B-298352FB-2024FB-2025FB-2026FB-2027B-576754FB-3010 B-315137 N/AMS-2918 SO-2011 B-876548 N/AMS-2009 B-1007768 N/A