Daktronics DF-1020 - Manual (Page 31)

Maintenance and 4-3
Troubleshooting
4. Position a new digit over the screws and tighten the nuts.
5. Reconnect the power/signal connector. Note: This is a keyed connector, it
will attach in one way only. Do not attempt to force the connection!
6. Close and secure the digit panel and test the display.
Replacing a Digit Segment
When a digit malfunctions, in most cases it is
necessary to replace the entire digit circuit board.
Some larger digits (24", 36", 48"), however, may
be constructed in segments, as shown in Figure
9 and it may be possible to make repairs by
removing only the defective segment. As with
smaller digits, the digit segment circuit boards
are mounted to the back of the digit panel. Do
not attempt to remove individual LEDs.
To remove a digit segment, follow these steps:
1. Open the digit panel as described
above.
2. Disconnect the 2-pin power/signal
connector from the back of the
individual segment. Release the
connector by squeezing together the
locking tabs as you pull the connector
free.
3. The individual segments are secured to the inside of the panel with fixed
machine screws, spacers, and push nuts. Remove the nuts and lift the
segment off the standoff screws.
4. Position a new segment over the screws and tighten the nuts.
5. Reconnect the power/signal connector. Note: This is a keyed connector it
will attach in one way only. Do not attempt to force the connection!
6. Close and secure the digit panel and test the display.
Replace a malfunctioning colon, decimal, or indicator assembly in the same manner.
Replacing a Driver
Drivers are typically mounted inside the display and immediately behind a digit, but
location and mounting varies by model. Refer to the component locations drawings
in Section 2 for the location of your driver. All displays in this manual are front-
accessible.
Each driver is enclosed with a power supply and signal terminal block. Before a
failed driver can be reached, the enclosure must be accessed. Follow these steps:
1. Open the digit panel or display face panel as described in Section 4.2.
2. Remove the cover from the driver enclosure.
Figure 9: Segmented Digit Panel
(Rear View)