Roller Distance between defects Replacement part
Photosensitive drum 94.2 mm (3.75 inches) Print cartridge
*The developer-roller circumference is 62.8 mm (2.5 inches). A defect that is related to the developing roller will most likely
repeat at intervals of 54.0 mm (2.125 inches) because of the way the roller is geared.
NOTE Defects on the tray pickup rollers or the tray 1 pickup roller do not cause a repetitive
defect. Defects on these rollers cause a defect to appear only on the leading edge of the
image.
Figure 7-8 Repetitive-defect ruler
Table 7-40 Repetitive defects (continued)
Image-formation troubleshooting 401
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