Repetitive image defect ruler First occurrence of print defect Toner/developing cylinder (37.7 mm) Toner/primary charging roller (37.7 mm) Transfer roller (45.2 mm) Heating element (56.5 mm) Pressure roller (62.8 mm) Toner/drum (75.4 mm) Figure 105. Repetitive image defect ruler 236 Chapter 6 - Troubleshooting EN