Daktronics Outdoor LED Scoreboards Service Manual - Manual (Page 27)

TNMC & Electronic Caption Troubleshooting & Maintenance 21
3.4 Power & Signal Summary
Reference Drawings:
Schematic, OD, 3500, 34mm TNMC, Red/Amb .................................... Drawing B-783938
Schematic, OD, 3500, 34mm TNMC, Wht .............................................. Drawing B-906385
Schematic, OD, 3500, 46mm, Red/Amb ................................................. Drawing B-923941
Schematic, OD, 3500, 46mm, Wht ....................................................... Drawing B-1036125
Schematic; OD, 3500 TNMC, 16x80 34mm, R/A/W ............................. Drawing C-1092559
Wiring Detail; FB-2534 or 2541 for TNMC Type Options ..................... Drawing A-1092840
Refer to Drawing B-783938, B-906385, B-923941, B-1036125, or C-1092559 in Appendix B for
detailed schematics about display power and signal routing.
Note: 16x80-34mm TNMCs are capable of receiving power and signal directly via
terminal block in the cabinet. Refer to Drawing A-1092840 in Appendix C.
Display signal routing can be summarized as follows:
1. Data from the All Sport ® controller (or DakTennis™ software) 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 from J17 on
the display driver 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 B 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.
2. From the power supply assembly, power is relayed to the first module, and then
from module to module.
3. 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).