PRG Best Boy 4000 Service Manual page 89

Step 3. At Head Controller PCB, disconnect Yoke Fan cable at position J16.
Step 4. Cut cable tie which secures cable to Head Assembly.
Step 5. Remove Yoke Plenum Cover.
Step 6. At Yoke Fan, remove one 8-32 x 1-3/8" PPSS screw and two 8-32 x 5/16" PPSS screws.
Step 7. Feed Yoke Fan cable through yoke arm and remove assembly.
Step 8. Replace Yoke Fan by doing steps in reverse. Apply Loctite 242 to screws.
Yoke Fan Cable
Figure 3-49: Removing Yoke Fan
BEST BOY 4000
Cable Tie
Plenum Cover
Yoke Fan
8-32 x 1-3/8"
PPSS Screw
8-32 x 5/16"
PPSS Screw (2)
®
SPOT LUMINAIRE FIELD SERVICE MANUAL 81