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C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-47
02.9631.0010
CONFIDENTIAL
15 Jan 98
6-32X5/8"PPZ SCREW
6-32 KEPS NUT
TIE WRAP SADDLE
2-56 NUT
BFBVIEW
6-32 X 5/8"PPB
SCREW
2-56X3/8"PPZ SCREW
Figure 3-4. Brightness/Filter Bulkhead Sensor Switch Removal and Replacement
Step 6.
Remove brightness iris.
a. At brightness iris, remove three 6-32x5/8"PPZ screws and
#6 flat washers that secure brightness iris to bulkhead,
remove belt, and remove brightness iris.
Step 7.
Install replacement brightness iris and re-assemble luminaire.
a. Install replacement brightness iris on front of
brightness/focus bulkhead and open iris.
b. Align three holes in brightness iris to holes in three black
grommets in bulkhead. For correct alignment of sensor pin
on iris, place sensor stop opposite brass hole plug.
c. Put #6 flat washer on each 6-32x5/8"PPZ screw and apply
Loctite 242 to screws.
d. Insert screws into iris assembly and grommets and partially
thread screws. Do not fully tighten screws.
e. Place 0.05 inch spacer between brightness iris and bulkhead
and fully tighten screws. Space must be maintained to
prevent grommets from rubbing against inside of iris.
f.
Install timing belt on iris pulley and then place around
pulley.