Drum motor (M4) The drum motor is a two-phase stepping motor. The drum motor operates the intermediate transfer belt (ITB) and the photosensitive drum cartridge and its related components. Toner cartridge motor (M5) The toner cartridge motor is a two-phase stepping motor. The toner cartridge motor operates the developer sleeve in the toner cartridge and performs the toner contact/separation function. Fan motor The fan motor is a DC brushless motor containing a hall element and the motor driver circuit. The printer has two exhaust fans (FM1 and FM2) and one inducting fan (FM3). 134 Theory of operation C7085-90921