Daktronics TI-2020 Multipurpose Track & Field LED Timing Display - Manual (Page 15)

Mechanical Installation
9
3.3 Mounting & Adjusting the Optional Horn
Both the TI-2020 and TI-2021 have the option of a vibrating, buzzer-type horn (part # 0A-
1152-0332). The horn is attached externally to the cabinet as described below:
1. Disconnect power to the display.
2. Remove the cover plate on the left side of the cabinet and discard. Be sure to save the
two screws, as these will be needed to attach the horn.
3. Run the horn cable into the cabinet through the mounting hole, as shown in Figure 6.
Reach through the hole and connect the horn‟s 2-pin plug to the mating jack.
(The horn jack is on the left-most cable in the cabinet when viewed from the front;
the cable is already plugged into the horn jack J18 on the driver).
4. Using the same screws that secured the plate, attach the horn to the cabinet.
5. Test the horn.
CAUTION: The horn is a 120 VAC device. Turn off the power to the display before adjusting
the horn!
The volume for the electronic, buzzer-type horn is set at its maximum level at the factory. If
the horn is too loud, reduce its volume by adjusting the setscrew mounted in the front of the
horn. A plastic tip on the screw touches the horn's diaphragm, reducing the volume. Turn the
screw clockwise and test the volume by operating the horn from the control panel. Continue
adjusting and testing until the desired volume level is obtained.
Note that with the noise of spectators, the horn will not seem as loud as when it is being
tested in an empty area, so be sure to set the volume according to the acoustics of the facility.
Figure 6: Horn Installation (Digit Panel Removed To Show Interior)
Horn
2-pin Plug
Internal Horn Cable