Daktronics AB-1600-1.5,2.5 - Manual (Page 4)

Table of Contents ii
Section 4: Maintenance & Troubleshooting .............................................................. 4-1
4.1 Maintenance & Troubleshooting Overview............................................................... 4-1
4.2 Operational Summary ................................................................................................ 4-2
Power Summary ......................................................................................................... 4-2
Line Receiver Signal Summary.................................................................................. 4-3
Data Distributor Signal Summary.............................................................................. 4-3
Ventilation & Temperature Sensing Summary .......................................................... 4-3
4.3 Accessing the Inside of the Display........................................................................... 4-4
Front Accessible Displays – Removing a Module..................................................... 4-4
Front Accessible Displays – Replacing a Module ..................................................... 4-5
Rear Accessible Displays – Removing Back Sheets.................................................. 4-5
Rear Accessible Displays – Removing a Module ...................................................... 4-6
Rear Accessible Displays – Replacing a Module ...................................................... 4-7
4.4 Lenses......................................................................................................................... 4-7
4.5 Lamp Testing & Replacement ................................................................................... 4-8
The Diagnostics Method of Lamp Testing & Replacement ...................................... 4-9
Optional Lampbank Driver Test Table .................................................................... 4-10
4.6 Lampbanks ............................................................................................................... 4-11
4.7 Removing a Lampbank ............................................................................................ 4-12
4.8 Replacing a Lampbank............................................................................................. 4-12
4.9 Display Ventilation Summary.................................................................................. 4-13
4.10 Fan Filters ................................................................................................................ 4-13
Filter Removal (Front Access) ................................................................................. 4-14
Filter Removal (Rear Access) .................................................................................. 4-15
4.11 Fans .......................................................................................................................... 4-15
4.12 Troubleshooting the Internal Temperature Monitoring System .............................. 4-16
4.13 Troubleshooting the Line Receiver.......................................................................... 4-17
4.14 Vertical Shift Boards................................................................................................ 4-18
4.15 Troubleshooting the Data Distributor ...................................................................... 4-20
4.16 Line Filters ............................................................................................................... 4-23
4.17 Weather Stripping Maintenance .............................................................................. 4-23
4.18 Louver Replacement ................................................................................................ 4-24
4.19 Interior Maintenance ................................................................................................ 4-24
4.20 Structural Maintenance & Inspection ...................................................................... 4-25
4.21 Cleaning the Signal Connectors............................................................................... 4-25
4.22 Modem/FCC Regulations......................................................................................... 4-26
4.23 Troubleshooting Checklist – Line Receiver Displays ............................................. 4-27
4.24 Troubleshooting Checklist – Data Distributor Displays.......................................... 4-28
4.25 Replacement Parts List – Line Receiver Displays ................................................... 4-29
4.26 Replacement Parts List – Data Distributor Displays ............................................... 4-30
4.27 Daktronics Exchange/Repair & Return Programs ................................................... 4-31
Appendix A: Reference Drawings ................................................................................... A-1
Appendix B: Forms and Reports.....................................................................................B-1