Repetitive defects troubleshooting First occurrence of print defect Color developer roller, 38 mm Charging roller, 44 mm Black developer roller, 52 mm Cleaning roller, 56 mm Developer DSD wheels 65 mm Transfer roller, 66 mm Transfer drum, once per 11-by-17 inch or A3-sized page or every other letter- or A4-sized page Fuser, 150.5 mm Imaging drum, 195 mm Transfer belt, 222 mm Figure 234. Repetitive defect ruler EN Repetitive defects troubleshooting 463