Daktronics WP-2103, Manual

Page: 17 / 36

Troubleshooting
13
Component Locations and Access
Reference Drawing:
Component Location; WP-2103 ..................................................................... DWG-3264487
In the WP-2103, the front panel is hinged on the left side. To gain access to the internal
display components, simply remove the two screws securing the front panel to the
display cabinet, and swing it open. DWG-3264487 in Appendix A illustrates the front panel
removed and all of the internal components exposed.
Note: Disconnect power before servicing the display! Also turn power OFF when the
display is not in use. In addition to discharging the batteries, prolonged power-on
may shorten the life of some electronic components.
Replacing Digits
LEDs are embedded in a circuit board that is
mounted to the back of the digit or display
face panel as shown in Figure 5 . Multiple digits
may be secured to a single 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 digit panel as described in
Component Locations and Access (p�
13) .
2� Disconnect the 9-pin plug from the back
of the digit by squeezing the locking tabs
together while pulling the connector free.
3� Use a 9/32" nut driver to remove the
nuts securing the digit to the inside of
the panel, and then lift the digit off the
standoff studs.
4� Position a new digit over the studs, and tighten the nuts.
5� Reconnect the 9-pin plug. This is a keyed connector and it will attach in one way
only. Do not force the connection.
6� Close and secure the digit panel, then power up and test the display to verify the
issue has been resolved.
Segmentation and Digit Designation
Reference Drawings:
Segmentation, 7 Segment Bar Digit ................................................................... DWG-38532
Component Location; WP-2103 ..................................................................... DWG-3264487
In each digit, certain LEDs always go on and off together. These groups of LEDs are
called segments. DWG-38532 in Appendix A details which connector pin is wired to each
digit segment and the wiring color code used throughout the display.
DWG-3264487 in Appendix A indicates the driver connectors controlling the digits. The
numbers shown in the upper half of a digit indicate which driver connector is wired to it.
Stud
Digit/Face
Panel
Digit Circuit
Board
Power/
Signal IN
Nut
Figure 5: Digit Panel Assembly