Daktronics DF-1020 - Manual (Page 33)

Maintenance and 4-5
Troubleshooting
Output connectors 1 through 16 each have nine pins. Pin 7 provides power (hot) to
the digit or indicators wired to that connector. The other eight pins provide switching
connections.
The display line controlled by the driver is set with jumper wires in the 12-pin
address plug inserted in jack J19. All DataMaster displays ship with a “Line 1” plug
installed.
4.5 Segmentation and Digit Designation
Reference Drawing:
Segmentation, 7 Segment Bar Digit ..............................Drawing A-38532
In each digit, certain LEDs
always go on and off together.
These groupings of LEDs are
referred to as “segments”.
Drawing A-38532 illustrates
digit segmentation. It also
details which connector pin is
wired to each digit segment
and the wiring color code used
throughout the display.
The component locations
drawings in Section 2 specify
the driver connectors
controlling the digits. Numbers
displayed in hexagons in the
upper half of each digit, as shown in Figure 10, indicate which connector or
connectors are wired to that digit. (Larger digits, like the 36" digits shown in Figure
10, are each wired to two connectors.)
16-Column LED Driver
Connector No. Function
J20 Protocol
J21-22 ISP
J23 12 V DC out
J24 Modem
J28 Switch inputs
TB1 CAN (photo/temp sensor)
Figure 10: Digit Designation