Daktronics TI-2002 Portable LED Timer - Manual (Page 15)

Scoreboard Troubleshooting 9
Replacing Digits
1. Open the front panel as described in Section 3.2.
2. Disconnect the power/signal connector from the back of the digit by squeezing
together the locking tabs and pulling the connector free.
3. Use a 9 /
32
" nut driver to remove the nuts securing the digits to the inside of the front
panel, and then lift the digit off the stud inserts.
4. Position a new digit over the studs (making sure the small plastic spacers are still in
place) and tighten the nuts.
5. Reconnect the power/signal connector.
Note: This is a keyed connector and it will attach in one way only. Do not attempt to
force the connection.
6. Secure the front panel to the display with the screws, then power up and test the
display to see if changing the digit has resolved the problem.
LED Drivers
The driver performs the task of switching LEDs on and off within the display. A driver has
numerous connectors providing power and signal inputs and outputs to the scoreboard digits
and indicators.
The table below shows the function of the primary connectors for a 4-column driver:
Connector # Function
1-4 Output to digits and indicators
17 Main power & signal
19 Address plug
Refer to Drawing A-123783 in Appendix A for detailed driver pin out/switch specifications.
When troubleshooting driver problems, two LEDs labeled DS1 and DS2 provide the
following diagnostic information:
LED Color Function Operation Summary
DS1 Green Power Steady on DS1 will be on and steady to
indicate the driver has power.
DS2 Red Signal RX Steady on
or blinking DS2 will be on or blinking when the
driver is receiving a signal and off
when there is no signal.
Note: While it is necessary to have the scoreboard powered on to check the LED driver
status indicators, always disconnect scoreboard power before servicing.