Uneven Pitch And Jitter Image - Samsung SL-X7600GX Service Manual

4.7.9. Uneven pitch and jitter image

A. Typical faulty images
B. Troubleshooting procedure
Step Cause
1 Under 3 mm periodic jitters or horizontal bands has
occurred.
2 Under 1 mm periodic jitter or horizontal bands has
occurred.
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Action
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.
•
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.)
4. Troubleshooting
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