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6.3.7 REPEATED SPOTS OR LINES ON PRINTS
The same spots or lines appear at regular intervals.
Interval Possible cause Necessary actions
At intervals of 33.6 mm
(1.32 inches)
Defective charge roller Replace the PCDU.
At intervals of 20.9 mm
(0.82 inches)
Defective development roller Replace the PCDU.
At intervals from 55.0 (end)
to 55.4 (center) mm (from
2.16 to 2.18 inches)
Defective paper transfer roller
Replace the paper
transfer roller unit.
At intervals of 75.4 mm
(2.96 inches)
Defective OPC drum Replace the PCDU.
At intervals of 78.5 mm
(3.09 inches)
Defective pressure roller
Replace the pressure
roller or fusing unit.
At intervals of 78.5 mm
(3.09 inches)
Defective fusing belt Replace the fusing unit.
At intervals of 40.82 mm
(1.60 inches)
Defective image transfer roller
Replace the image
transfer roller.
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