Daktronics AF-3150-20-R,A - Manual (Page 21)

Electrical Installation
3-1
3: Section Electrical Installation
Only a qualified individual should terminate power and signal cable within this
Daktronics display.
The Daktronics engineering staff must approve any changes made to the display. Before
altering the display, submit detailed drawings for the proposed modifications to the
Daktronics engineering staff for evaluation and approval, or the warranty will be rendered
null and void.
3.1 Common Connectors in the Display
The power and signal connections in the displays use many different
types of connectors. Take special care when disengaging any
connector to prevent damage to the connector, cable, or circuit board.
When pulling a connector plug from a jack, do not pull on the wire or
cable; pull on the jack itself. Pulling on the wires may damage the
connector.
The following information presents some common connectors
encountered during display installation and maintenance.
.
Figure 9: Ribbon
Cable Connector
1. Ribbon Cable Connectors:
Figure 9 on the right illustrates a typical ribbon connector. To
disconnect the ribbon cable, push the plastic clips on the
sides out to unlock and remove the jack.
Figure 10: Termination
Block
Before replacing a ribbon cable connector, spray it with
DeoxIT
™ contact cleaner to remove any foreign matter that
may cause signal problems. In addition, apply a generous
amount of CaiLube
™ protector paste to the plug before
inserting it into the jack. This paste will protect both the plug
and the jack from corrosion.
2. Termination Blocks:
Termination blocks are usually used to connect internal
power and signal wires to wires of the same type coming into
the display from an external source. Power wires need to
have one-half inch of insulation stripped from the end of the
wire prior to termination. Tighten all screws firmly to ensure
a good electrical connection. Refer to
Figure 10 on the right.
Figure 11: Phoenix
Connector
3. Phoenix
™
-Style Connectors:
Phoenix-style connectors, which are usually green, are often
used for signal termination on circuit boards. Refer to
Figure
11 on the right. Strip one-quarter inch of insulation from the
wire prior to termination. To remove a wire, turn the above
screw counter-clockwise to loosen the connector's grip on the
wire. To insert a wire, push the bare wire into the connector
and turn the above screw clockwise to lock the wire into
place.