Xerox C2424 Service Manual - Page 61
The Exit Module or Media Exit Path MEP, The Drum Assembly and Transfix System
UPC - 095205676532
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The Process Drive: An open loop system that transmits torque to two main camshaft assemblies. One camshaft assembly controls the transfix roller loading, and the other controls the drum maintenance system and printhead tilt system. The Media Path Drive: The gearbox and motor assembly controls each roller in the paper transport system. The paper transport system consists of a drive motor, a gearbox assembly and three solenoids. The media path drive motor also controls the movement of the wiper assembly and the headlock mechanism through a gear train and solenoid on the exit module. The Ink Loader: Melts the solid ink as ink is required by the printhead. The melted ink drops into the ink reservoirs of the printhead underneath the ink loader. The Printhead: inteRfaces with the electronics of the system to jet ink onto the drum surface to create an image. The printhead includes 1236 interleaved jets (309 of each primary color) to provide the ability to electronically turn off a weak or missing jet to restore image quality. The Drum Maintenance System: Creates a thin intermediate liquid transfer surface, a layer of silicone oil, on the surface of the drum prior to printing. The oil keeps the ink from sticking to the drum's surface and facilitates its transfer to the sheet of paper or transparency film. The Preheat and Deskew System: Serves to ensure that the print media (paper, envelope, or transparency film) aligns properly to the drum and that the media is sufficiently warms to facilitate transfer of the image from the drum to the media. The Drum Assembly and Transfix System: Form the key portion of where imaging takes place. The image is first printed as a "mirror" image on the rotating drum. A sheet of warmed media feeds from the preheater and passes between the drum and the transfix roller. The process gear train then loads the transfix system and presses the paper to the drum to adhere the image as the drum spins in the transfix direction. The Exit Module or Media Exit Path (MEP): Receives control signals from the exit module (MEP) board, which contains its own firmware, for proper handling of media exiting the IOT. The exit module takes transport control of the media, lifting it from the area of the ink loader and delivering it to the output tray at the front of the IOT. The Purge System: Uses air pressure and a wiper blade to remove any debris or air bubbles that may be obstructing the printhead nozzles. Theory of Operation 2-17