PRG Best Boy Field Service Manual - Manual (Page 89)

BEST BOY 4000 ® SPOT LUMINAIRE FIELD SERVICE MANUAL 81
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.
Figure 3-49: Removing Yoke Fan
FA
N
J1
6
YO
K
E
Yoke Fan Cable
Cable Tie
Plenum Cover
Yoke Fan
8-32 x 1-3/8"
8-32 x 5/16"
PPSS Screw (2)
PPSS Screw