C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-83
02.9631.0010
CONFIDENTIAL
15 Jan 98
Step 13.
Remove yoke cables from luminaire.
a. Cut off tie wraps from cables coming from motherboard,
saddle in motherboard card cage, and tie wrap saddle
located on pan/fan housing.
b. At motherboard, disconnect yoke cable 24- and 26-position
connectors from headers.
c. Remove two 4-40x3/8"PPZ screws that secure yoke cable
grommet plate to bottom left of pan/fan housing and
remove black grommets from plate.
d. Remove 6-32 KEPS nut holding ground wire to fan
housing.
e. Pull out yoke cables and ground wire from fan housing end,
not cable side rail.
Step 14.
Install replacement yoke cable assembly.
a. At replacement cable assembly, tape yoke cables and
ground wire together.
b. To strengthen cable end, tape very long tie wrap or
luminaire safety cable to end of yoke cable and ground wire.
c. Place yoke 180
°
(opposite side) from pan stop.
d. Insert tie wrap or safety cable into pan tube, routing tie
wrap through yoke arm on cable side until it is visible in tilt
tube (cable side of yoke arm can be identified by groove on
tilt tube)
(Figure 3-24).
e. Pull tie wrap or safety cable through tilt tube and pull out
yoke cables and ground wire. Ensure cables are fully pulled
through and there is no slack on pan shaft collar side.
f.
Remove tape and tie wrap from yoke cables and ground
wire.
g. Maneuver yoke cables on cable side of yoke so that springs
on yoke cable are halfway inside tilt tube (Figure 3-25).
Ensure that cables are not twisted when yoke is at center of
rotation.
h. Dress cables as shown in figure 3-25 and secure with tie
wrap.