NJ750 Training Guide
13.Vertical banding through an image can be caused by mottling of the ink on low saturation media like bond, the carriage bushings are worn out causing ‘carriage chatter’, or the lower roller is extending too high through the platen. Vertical banding can also be caused by a defective trailing cable or when ink saturations are extremely high (>290%) and the dryer is used with high heat applied.
14.Unusual patterns which print in either the Prime pattern (lower left illustration) or in normal prints (lower right illustration) are symptoms of a defective trailing cable. Replace the white trailing cable (service required). To prevent these failures from occurring ensure the trailing cable is cleaned every two weeks.
21