My Oki C3200N keeps giving me a sensor error on the Cyan Drum.  Panel states Sensor error C Cartridge.  Any ideas what this could be.  I have cleaned the printer very well and have switched the Drum and Cartridge out with another used one and still get the error.  I did notice that the contacts on the drum were sort of black and I cleaned them but still have the error.
Thanks for your suggestions.
Billy Correll
			
			Thanks for your suggestions.
Billy Correll
