4. Troubleshooting
4.7.9. Uneven pitch and jitter image
A. Typical faulty images
B. Troubleshooting procedure
Step
Cause
Action
1
Under 3 mm periodic jitters or horizontal bands has
occurred.
Check if the foreign substance at the drive gears.
Grease the gears.
•
Developer unit gears.
•
Drum unit gears.
•
Main drive unit gears.
If the problem persists, replace the abnormal units.
•
Developer unit.
•
Drum unit.
•
Main drive unit.
2
Under 1 mm periodic jitter or horizontal bands has
occurred.
Check if the LSU is assembled correctly. If not, remove
and tighten the screws.
(Refer to 3.3.5.)
If the problem persists, replace LSU
(Refer to 3.3.5.)
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