Daktronics BA-1518 Multi-Section Outdoor LED Scoreboard - Manual (Page 45)

TNMC & Electronic Caption Troubleshooting & Maintenance 39
6.4 Power & Signal Summary
Reference Drawings:
Schematic, Amber TNMC, GEN IV ......................................................... Drawing A-252645
Schematic, Red TNMC, GEN IV ............................................................. Drawing A-252681
Schematic; 832 / 848 / 864 Red TNMC GEN IV, 240V ........................... Drawing A-294858
Schematic; 832 / 848 / 864 Amber GEN IV, 240V .................................. Drawing A-294919
Schematic, OD, 3500, 34mm TNMC, Red/Amb .................................... Drawing B-783938
Schematic, OD, 3500, 34mm TNMC, Wht .............................................. Drawing B-906385
Schematic, OD, 3500, 46mm, Amb/Wht ................................................. Drawing B-923940
Schematic, OD, 3500, 46mm, Red/Amb ................................................. Drawing B-923941
Schematic, OD, 3500, 46mm, Wht ....................................................... Drawing B-1036125
Refer to Drawings B-783938, B-906385, B-923941, or B-1036125 for detailed schematics about
display power and signal routing.
Notes:
1) For displays built before September 2009, refer instead to Drawings A-252645,
A-252681, A-294858, or A-294919.
2) For amber 46mm displays built between September 2009 and November 2010, refer
to Drawing B-923940.
Display signal routing can be summarized as follows:
1. Data from the All Sport ® controller travels via cable harness into the scoreboard.
2. The signal travels to the driver/power enclosure through the J1 connector on the
signal surge arrestor card.
3. Data exits at J42 via current loop harness, and connects with P43 at the driver
assembly. A power/signal interconnect (ribbon cable) carries the signal to the first
module, and the signal relays from module to module, in daisy-chain style, until it
reaches the last module on the message center.
4. Electronic captions use multiple J42-P43 connections between drivers to relay the
signal to every display. Refer to the schematic drawings in Appendix A for precise
connections of a particular scoreboard.
Display power routing can be summarized as follows:
1. Incoming power terminates at the terminal block in the scoreboard driver enclosure.
Using the same harness and J42-P43 connections as signal, power is then routed to
the display driver where it then travels to the power supply assembly.
1. From the power supply assembly, power is relayed to the first module, and then
from module to module.
2. The modules and display driver draw their power directly from the power supply
assemblies (3-12.5 VDC). The power supply voltage is set by a resistor loaded on the
module (via J4).
Note: In displays built before September 2009, modules draw their power directly
from the power supply assemblies (6.5 V for red LED modules, 9 V for amber), while
the display driver receives 16 V power from a transformer on the driver tray.