An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The black toner removed from the surface of the black image carrier is collected to the black image developing unit. A raised rib portion extends around a periphery of the opening of the face plate. It is movable relative to the vaporizer between a first position operably coupled to the vaporizer and a second position spaced apart from the vaporizer.