Daktronics WR-2101, Руководство пользователя

Страница: 11 / 38

Troubleshooting
7
Problem Possible Cause Solution/Items to Check
Display works, but some
LEDs always stay on
Short in digit/indicator
circuit
Exchange the digit/indicator with a
working one of the same part # to verify
the problem. Replace if necessary. See
Replacing Digits (p.7) .
Display works, but some
LEDs do not light or they
blink
Bad connection
Verify the connector on the back of the
digit circuit board is secure.
Bad digit or driver
Exchange the digit or driver with a
working one of the same part # to verify
the problem. Replace if necessary. See
Replacing Digits (p.7) or LED Drivers
(p.7) .
Display works, but some
digits do not light
Bad digit or driver (see solution above)
Incorrect sport code (see solution on previous page)
Incorrect driver address (see solution on previous page)
Component Location & Access
To access the driver, digits, or other internal components, remove the screws securing the
face panel(s) to the scoreboard. Some panels are hinged at the bottom and will swing
downward.
Replacing Digits
LEDs are embedded in a printed circuit board (PCB) that is mounted to the back of the
face panel. Do not attempt to remove individual LEDs. In the case of a malfunctioning
LED or digit segment, replace the entire digit circuit board.
To replace a digit:
1. Open the face panel as described in Component Location & Access (p.7) .
2. Disconnect the plug 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 panel,
and then lift the digit off the spacers and standoff studs.
4. Position a new digit over the studs. Make sure the small plastic spacers are still in
place, and then tighten the nuts.
5. Reconnect the plug to the back of the digit. This is a keyed connector and will attach
in one way only. Do not force the connection.
6. Close and secure the face panel, then power up and test the display to verify the
issue has been resolved.
LED Drivers
The LED driver performs the task of switching digits on and off within the display. Refer to
the electrical and signal specifications drawings in Appendix A to determine the location
of the driver in a particular scoreboard model.
When troubleshooting driver problems, several LEDs shown in
Figure 4 provide diagnostic
information. The number of LEDs and their function depends on the driver type.
Note: While it is necessary to have the display powered on to check the LED status
indicators, always disconnect power before servicing.