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Cause Solution
A Defective cartridge. Check if the photosensitive drum in the problem
(misregistered) color’s cartridge rotates smoothly.
If not, replace the cartridge.
Worn/Chipped cartridge drive gears. Check drive gears connected into the problem
(misregistered) color’s cartridge. If worn or
chipped, replace the gear.
B Dirty color misregistration sensor. Clean the lens of the color misregistration sensor.
Defective color misregistration sensor. Replace the color misregistration sensor.
Defective transfer unit. If the transfer unit does not rotate smoothly,
replace the transfer unit.
Worn/Chipped drive gears. Check drive gears between the image drive unit
and the drum motor. If worn or chipped, replace
the gear.
Defective image drive unit. Replace the image drive unit.
Defective laser/scanner unit. Replace the laser/scanner unit.
Defective DC controller PCB. Replace the DC controller PCB.
Smearing
Table 7-35. Causes for smearing
Cause Solution
Poor contacts to each cartridge and printer
grounding.
Clean the grounding contacts on each cartridge
and the printer. If the problem remains after
cleaning, check contacts for deformation or
damage. Replace parts, if deformed or damaged.
Make sure all contacts are connected correctly.
The movement of the fuser front paper sensor lever
is not smooth.
Reseat the lever to make the movement smooth.
Foreign substances/dirt on the fuser inlet guide. Clean the fuser inlet guide.
Misplaced image
Table 7-36. Causes for a misplaced image
Cause Solution
Paper is skewed. See Table 7-12. Causes for skewed paper to
resolve the reason for the skew.
Oblique rollers are worn. (If problem only occurs on
the back side of duplex printing only.)
Replace the oblique rollers.
Table 7-34. Causes for smearing (continued)
ENWW Image defects 399