Kodak NOVAJET 750 Training Manual page 21

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.
NJ750 Training Guide
21