8.6 Power-On Self-Test.................................................................................................... 8-38.7 Lightning Protection................................................................................................... 8-48.8 Replacement Parts...................................................................................................... 8-48.9 Troubleshooting ......................................................................................................... 8-58.10 Daktronics Exchange and Repair and Return Programs............................................. 8-5Section 9: Team Name Message Center Maintenance ................................................ 9-19.1 Team Name Message Center System Overview......................................................... 9-19.2 Maintenance and Troubleshooting Overview............................................................. 9-19.3 Signal Summary ......................................................................................................... 9-29.4 Power Summary ......................................................................................................... 9-29.5 Service and Diagnostics ............................................................................................. 9-2TNMC Current Loop Interface (CLI) Card ......................................................... 9-3TNMC Controller ................................................................................................ 9-3Modules and Drivers ........................................................................................... 9-5Power Supplies .................................................................................................... 9-6Weatherstripping ................................................................................................. 9-79.6 TNMC Display Maintenance ..................................................................................... 9-79.7 Troubleshooting ......................................................................................................... 9-79.8 Initialization Information at Startup ........................................................................... 9-89.9 Replacement Parts List............................................................................................... 9-89.10 TNMC Exchange and Repair and Return Programs .................................................. 9-9Section 10: Scoreboard Options ................................................................................... 10-110.1 Team Name Captions: Models BA-624-11, BA-1518-11 and BA-1524-11 ............ 10-110.2 Trumpet Horn........................................................................................................... 10-2AC Trumpet Horn Installation (Internally Mounted)......................................... 10-2DC Trumpet Horn Installation (Externally Mounted)........................................ 10-2Appendix A: Reference Drawings .....................................................................................A-1Appendix B: Eyebolts .........................................................................................................B-1Table of Contentsii