Service manual

MAINTENANCE : MAINTENANCE PROCEDURES
2
02.9676.0020 B 29-May-2009 31
Main Control Board (MCB) PCB Replacement
Parts:
24.9676.3730
To remove and replace an MCB PCB:
Step 1. Disconnect luminaire AC input cable from power source.
Step 2. At board-side leg, remove yoke leg cover by removing four 6-32×5/16" PTB
screws. To find board-side leg, refer to page 8.
CAUTION: Always use anti-static precautions when working with PCBs.
Figure 2-16: MCB PCB Replacement
Step 3. Disconnect wiring harness connectors J8, J9, and J11.
Step 4. Remove four (4) 6-32 x 3/8" PPZ SEMS screws securing MCB PCB.
Step 5. Disconnect upper enclosure connectors at back of MCB.
Step 6. Install replacement assembly by performing Steps 2 through 5 in reverse
order.
Screws
MCB PCB
Yoke Leg Cover