Service manual

Repetitive image defect ruler
Use a repetitive image defect ruler to measure occurrences of repetitive image defects to help solve
image quality problems. Place the ruler next to the first occurrence of the defect on the page. Find
the distance between identical defects and see the
Table 6-15 Repetitive image defects on page 149
table to identify the component that is causing the defect.
Table 6-15 Repetitive image defects
Measurement Component
24.7 mm (0.97 inch) Developer sleeve
26.7 mm (1.05 inches) Charge roller
32.9 mm (1.3 inches) RS roller
37.7 mm (1.48 inches) Transfer roller
54.5 mm (2.15 inches) ETB rollers
56.6 mm (2.22 inches) Fuser sleeve
62.8 mm (2.47 inches) Pressure roller
75.4 mm (2.97 inches) OPC
ENWW Repetitive image defect ruler 149