Daktronics CR-2004, Display Manual, Page: 43 / 90

TNMC Troubleshooting & Maintenance 37
Front Access
1. Loosen the latch fasteners on the front
face the LED module using a 1/8" hex
wrench (or
7
/
32
" nut driver for displays
installed prior to 11/29/05). One latch
fastener is centered below the top row of
pixels and one is centered above the
bottom row (
Figure 25 ).
2.
Turn each fastener a quarter-turn
counter-clockwise (if using a nut driver,
turn the top latch clockwise and the
bottom latch counterclockwise).
Note: Do not over turn the fastener!
Carefully remove the module from the face of the message center.
Rear Access
1. To access the internal components from the rear, remove the appropriate rear-access
panel from the display cabinet 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 display cabinet.
Note: Be careful when removing and handling the access panels as internal display
components may still be attached to them.
The display 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 displays built before September 2009, the display driver is located behind the first
access panel and the primary power supply is located behind the second access panel.
6.6 Display Drivers
Reference Drawings:
Address Table, 129 Through 255 ........................................................... Drawing A-115079
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
Figure 25: Module, Front View
Figure 26: Display Cabinet Rear Access