Daktronics DF-4000 - Manual (Page 20)

Maintenance and
Troubleshooting
4-2
Component placement varies slightly with each DataMaster model; consult the
model-specific mechanical drawing to determine the layout for your display.
Note: Disconnect power before servicing the display! Disconnect power, too,
when the display is not in use. Prolonged power-on may shorten the life of
some electronic components.
4.3 Schematics
Reference Drawings:
Specifications; Gas Price Driver, 4 Col. ........................ Drawing A-250728
Wiring Schematic, DF-2000/4000 Series ............................ Drawing A-263988
Drawings A-263988 is the schematic diagram and Drawings A-250728 is the
Driver Specification Diagram for the driver used in the DataMaster Petroleum Price
displays. The schematic includes power and signal inputs and all wiring for the
models described in this manual.
4.4 LED Drivers
Reference Drawings:
Specifications; Gas Price Driver, 4 Col. ........................ Drawing A-250728
In the display, the LED drivers perform the task of switching digits on and off. Refer
to Drawings A-250728 for a complete listing of driver connector functions and
wiring pin numbers.
4-Column LED Driver
Connector No. Function
J1 – 4 Digits
J5 Not loaded
J6 CL Input
J7 Program
J8 CL Output
J9 Not loaded
J10 Modem
J11 Radio
J12 RC-50 Input