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TNMC Maintenance
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This section provides the following TNMC information:
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Signal routing summary: provides a basic explanation of signal travel through the
TNMC display.
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Power routing summary: provides a basic explanation of power travel through the
display.
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Service and diagnostics: provides instructions for removing various display
components and explains the functions of circuit board connectors as well as the
meanings of diagnostic LEDs.
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Maintenance: lists a number of steps to take to keep the team name message centers
in safe, working order.
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Troubleshooting: lists possible display malfunctions and suggests a number of
causes and corrections for each malfunction.
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Replacement parts list: includes the part description and number of display
components that may have to be replaced during the life of this display.
9.3 Signal 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 the schematics, Drawing A-252645 , A-252681 , A-294858 , or A-294919 , for complete
information on TNMC signal routing. Drawing A-257029 indicates the locations of the
internal electronic components. From signal input from the All Sport ® controller, routing can
be summarized as follows:
1.
Data from the display controller travels via cable harness into the scoreboard.
2. The signal then travels through the driver/power enclosure to the J1 connector on
the current loop interface card.
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.