15PG-M20SPG-M20X5. Removing the other PWBs5-1. Disconnect the connectors.5-2. Remove the four lock screws from the power PWB.5-3. Remove the lock screw from the ballast PWB unit.5-4. Remove the three hex support screws from the input PWB.5-5. Remove the lock screw from the terminal block cover.5-6. Remove the three lock screws from the PFC PWB.5-3Bottom bodyBallast PWB unit 5-65-25-15-15-1PFC PWB unitPower PWB unitInput PWB unit5-45-5