Daktronics Single-Section Outdoor LED Scoreboards - Manual (Page 28)

22 TNMC Troubleshooting & Maintenance
Rear Access
1. To access the internal components from the rear, remove the appropriate rear-access
panel from the TNMC by loosening all four of the screws.
2. Slide the access panel sideways to the larger part of the keyhole and carefully lift it
off the TNMC cabinet.
Note: Be careful when removing and handling the access panels as internal TNMC
components may still be attached to them.
The TNMC driver and primary power supply will always be located behind the first access
panel on the right, when viewing the display from behind. Any additional power supplies are
noted in the appropriate component location drawings.
Note: In TNMCs built before September 2009, the TNMC driver is located behind the first
access panel and the primary power supply is located behind the second access panel.
3.6 TNMC Drivers
Reference Drawings:
4 Column MASC LED Driver Specifications ............................................ Drawing A-166216
Address Table: Driver- MCAST G2- TNMC Switch ................................. Drawing A-328274
Specifications; Driver, MCAST, 4 Col ...................................................... Drawing A-793970
The TNMC driver is detailed in Drawing A-793970 in Appendix C. Figure 24 illustrates some
of the primary jacks and switches on the 4 Column MCAST driver used for TNMC functions.
The S2 DIP switch is the component for setting the address (switches #1-4). With switches 1-4
off, the address setting for a TNMC is preset at “221”. (There may be other address settings if
the TNMC is used to display messages other than team names.) Refer to Drawing A-328274
in Appendix C for more information on setting the driver address.
The S2 DIP switch also controls Home and Guest display. When the #5 switch is ON, the
TNMC sends guest team information to the matrix display. In the opposite message center,
the switch would be set to OFF, and home information would be displayed.
Figure 23: TNMC Cabinet Rear Access (8x48-46mm Shown)