Lexmark C720 Service Manual - Page 303

5024-001 Fuser Unit Removal CAUTION: 1. The fuser unit consists of important parts in terms of safety. Therefore, replacement of parts or removal and maintenance work should be done at the appropriate facilities by skillful service personnel acquainted with electrical safety. After the assembling work, the product safety should be reconfirmed. 2. Since the fuser unit is very hot, make sure the fuser unit and perimeter is cooled down prior to starting the replacement of parts. 3. The fuser unit contains silicone oil. Take care not to drop, tilt, or lay the fuser unit on its side as the silicone oil could spill on the floor, which could be dangerous. WARNING: When replacing the fuser unit, wait 30 minutes before copying more than 30 pages (for testing only). The fuser unit requires this amount of time for replenishment of the oil application pad inside the fuser unit. Insufficient lubrication causes paper jams and reduces the life of the fuser. Running more than 30 copies may damage the fuser unit. Repair Information 4-93