The Figure 4 UV Curing Unit 350 was designed to minimize operator exposure to electrical hazards during normal operations. Do not remove any panels or other parts of the Figure 4 UV Curing Unit 350 casing. All exposed electrical circuits are contained within limited-access cabinets. This is to separate the operator from service and maintenance areas. Only 3D Systems Service Personnel should access the electrical panels. 120-240 V~ power is present in multiple locations throughout the unit. Whenever performing maintenance procedures, power down the machine and unplug it if power is not necessary for service.