Daktronics Galaxy AF-3080 Series, Display Manual

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Section 3: Electrical Installation
Only a qualified individual should terminate power and signal cable within this
Daktronics sign
.
The Daktronics engineering staff must approve
any changes made to the sign. Before altering
the sign, submit detailed drawings for the proposed modifications to the Daktronics
engineering staff for evaluation and approval or you will render the warranty null and void.
3.1 Common Connectors in the Sign
The power and signal connections in the signs use many different
types of connectors. Take special care when disengaging any
connector so as not to damage the connector, the cable, or the
circuit board.
Figure 12: Ribbon
Cable Connector
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 sign installation and maintenance:
1. Ribbon Cable Connectors:
Figure 12 on the upper right illustrates a typical ribbon
connector. To disconnect the ribbon cable, push the metal
clips on the sides to unlock and remove the jack.
Figure 13: 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 in the plug before
inserting it into the jack. This paste protects both the plug
and the jack from corrosion.
2. Termination Blocks:
Termination blocks connect internal power and signal
wires to wires of the same type coming into the sign from
an external source. Most signal wires come with forked
connectors crimped to the ends of the wire. 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 the
right for
Figure 13 .
Figure 14: Phoenix
Connector
3. Phoenix
ä
-Style Connectors:
Phoenix-style connectors, usually green, allow for signal
termination on circuit boards. Refer to
Figure 14 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 connectors 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.
Electrical Installation
3-1