Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 97

WIRE-WRAP CONNECTIONS
Wire-wrap connections provide twisted-pair wire connections to the chassis
backpanel. Removal and replacement of one or more wire-wrap connections may
be required during replacement of twisted-pair wires or backpanel connectors.
TOOLS REQUIRED
Wire unwrapping tool (12259183), wire wrapping gun (12259111),
wirestripper (12262555).
REMOVAL
1. Remove power from computer cabinet by following Computer Cabinet Power
Down procedure steps 1 through 4.
2. Place end of wire unwrapping tool over end of wire-wrap pin from which
wire is to be removed.
CAUTION
Do not allow broken pieces of wire to
fall into wire mat.
3. Push tool gently toward pin and turn counter-clockwise approximately
six turns.
4. Pull tool and wire from wire-wrap pin when wire loosens or unwraps.
REPLACEMENT
1. Install a bit in wire-wrap gun that fits size of wire to be replaced.
2. Cut off wire end removed from wire-wrap pin and strip 25 nun (1 in) of
insulation from end of wire. New wires do not require this step.
3. Insert bare end of wire as far as it will go into small hole of bit.
4. Bend wire across end of bit and back against bit shaft; hold wire to
shaft.
5. Place large hole in end of bit over pin while keeping wire--wrap gun
aligned with pin.
6. Apply power to wire-wrap gun, allowing gun to back off from pin during
wrapping; do not push or pull gun.
60469500 A
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