Daktronics TI-2020 Multipurpose Track & Field LED Timing Display - Manual (Page 25)

Display Maintenance 19
Section 6: Display Maintenance
IMPORTANT NOTES :
1. Disconnect power before doing any repair work on the display.
2. Allow only qualified service personnel access to internal display electronics.
3. Disconnect power when not using the display.
6.1 Component Location & Access
Reference Drawing:
Electrical Spec – TI-2020 ...................................................................... Drawing A-178820
Electrical Spec – TI-2021 ...................................................................... Drawing A-305729
TI-2020 and TI-2021 are front-access displays. All internal electronic components and digits
can be reached by opening a digit panel on the front of the display.
Digit panels on the displays are held in place by machine screws across the top and bottom of
each panel, as shown in Figure 8. Open the display with care. Hold the digit panel in place by
putting hand pressure on it while removing the screws, and carefully lift it from the board,
sliding it outward and down. If the panel is not held in place, it could drop when the screws
are removed, possibly damaging LEDs or the digit wiring.
With the portable timing displays, the driver and key electronic components are located in an
enclosure immediately behind the center set of digits. Drawing A-178820 and Drawing A-
305729 in Appendix A show component locations for the TI-2020 and TI-2021, respectively.
Figure 8: TI-2020, Front View w/ All Digit Panels
Digit Panel @ 3
Screw