Daktronics MS-2113, Руководство пользователя

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Troubleshooting
16
Component Locations & Access
Reference Drawing:
Electrical Specifications- MS-2113 .................................................................. DWG-3275249
In the MS-2113, the entire back panel is hinged on the right side (as viewed from the
rear). The left-rear side of the display has 3 slotted latches securing the access panel.
To access the internal scoreboard components, use a flathead screwdriver to turn all 3
latches 1/2 twist counterclockwise and swing the access panel open. DWG-3275249 in
Appendix A illustrates the back panel open 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 a black polycarbonate tray
and encased in protective gel. This weather-
sealed digit tray is mounted to the back of a
digit panel as shown in Figure 7 . 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. To replace a digit:
1� Open the back panel as described in
Component Locations & Access (p.16) .
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 back panel, then power up and test the display to verify the
issue has been resolved.
Segmentation & Digit Designation
Reference Drawings:
Segmentation, 7 Segment Bar Digit ................................................................... DWG-38532
Electrical Specifications- MS-2113 .................................................................. DWG-3275249
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-3275249 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 Panel Digit
Power/
Signal IN
Nut
Figure 7: Weather-Sealed Digit Panel Assembly