Do not attempt to remove any outer panels or covers from the printer unless prompted in this guide. Do not attempt to override any safety switches or gain access to service-restricted areas. All exposed electrical circuits are contained within limited-access cabinets. This is to separate the operator from service and maintenance areas. Only Certified Service Personnel should access the electrical panels. Whenever performing maintenance procedures, power down the machine and restrict AC power if possible. The circuit that the printer is on must be protected by an overcurrent protection UL 489 listed-certified as “branch type”.