Daktronics TN-2010, Display Manual

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TNMC Maintenance 6-3
•
Data exits at J42 via current loop harness, and connects with P43 at the
TNMC controller assembly. An interconnect harness 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.
6.4 Power Summary
Reference Drawings:
Schematic, Red TNMC, Gen IV................................... Drawing A-252681
Schematic; Amber TNMC, Gen IV............................... Drawing A-252645
Component Locations; 832/848
Red/Amb LED TNMC, G4 ..................................... Drawing A-257029
Refer to your schematic,
A-252681 or A-252645 , for complete information on
TNMC power routing. Drawing A-257029 indicates the locations of the internal
electronic components. Note that amber TNMCs always contain two power supplies,
while red TNMCs require only a single power supply.
Power routing for the display can be summarized as follows:
•
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 controller where it then travels to both
the power supply assembly and to a transformer on the controller tray.
•
From the power supply assembly, power is relayed to the first module, and
then from module to module.
•
While the modules draw their power directly from the power supply
assemblies (9 V for red LED modules, 12 V for amber), the TNMC
controller itself receives 16 V power from the transformer.
6.5 Service and Diagnostics
The following subsections address servicing of these display components:
TNMC Controller
Modules and Drivers
Power Supplies
The subsections also address diagnostic LEDs and signal/power connectors found on
the TNMC controller.
Warning: Disconnect power before servicing internal components!