Daktronics BA-2000 Series, Display Manual

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TNMC Troubleshooting & Maintenance
– Model BA-2018
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7.4 Power & Signal Summary
Refer to Drawings B-188553 or B-190140 in Appendix A to view detailed schematics about
power and signal routing for red and amber TNMC cabinets, respectively.
Signal routing for the TNMC 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 TNMC 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.
Power routing for the TNMC 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 TNMC 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 draw their power directly from three power supply assemblies with
12 V per power supply for red LED modules and 24 V for amber, while the TNMC
driver receives 16 V power from a transformer on the driver tray.
7.5 Component Locations & Access
Figure 39 illustrates the component locations of an 8x48-64mm TNMC. Refer also to
Drawings B-219923 and B-219932 in Appendix A to view component locations for red and
amber TNMC cabinets, respectively. TNMC cabinets have been designed so that they may be
accessed from both the front and rear.
Figure 39: 8x48-64mm TNMC Cabinet with Modules Removed