Daktronics BA-515, Руководство пользователя, Страница: 65 / 208

TNMC Maintenance
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9.4 Power Summary
Reference Drawings:
Schematic, Amber TNMC, GEN IV ......................................................... Drawing A-252645
Schematic, Red TNMC, GEN IV ............................................................. Drawing A-252681
Component Locations; 832/848 Red/Amb Led TNMC, G-4 ................... Drawing A-257029
Schematic; 832 / 848 / 864 Red TNMC GEN IV, 240V .......................... Drawing A-294858
Schematic; 832 / 848 / 864 Amber GEN IV, 240V .................................. Drawing A-294919
Refer to your schematic,
Drawings A-252645 , A-252681 , A-294858 , or A-294919 , for complete
information on TNMC power routing. Drawing A-257029 indicates the location 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:
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 controller where it then travels to both the power supply assembly and to
a transformer on the controller tray.
2. From the power supply assembly, power is relayed to the first module, and then
from module to module.
3. While the modules draw their power directly from the power supply assemblies (6.5
V for red LED modules, 9 V for amber), the TNMC controller itself receives 16 V
power from the transformer.
9.5 Service and Diagnostics
The following subsections address servicing of these display components:
ƒ
TNMC Controller
ƒ
Modules and Drivers
ƒ
Power Supplies
The subsections also address diagnostic LEDs and signal/power connectors found on the
TNMC controller.
Remember: Disconnect power before servicing internal components!