Vertical Black Lines - Samsung MultiXpress K4 Series Service Manual

4.7.1. Vertical Black Lines

A. Typical faulty images
B. Troubleshooting procedure
Step Check item
1 OPC is scratched or contaminated in the vertical
direction.
2 If Charge Scorotron saw in Developer unit is
contaminated?
3 If the Charge Scorotron saw is defected?
4 Scanner unit is contaminated.
(ADF Glass / Mirror / CCD Sensor)
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Action
Replace Drum unit.
(Refer to 3.2.1.)
Clean the Scorotron with the Cleaning bar.
Replace Drum unit.
(Refer to 3.2.1.)
Wife the surface of contaminated parts with a soft cloth.
4. Troubleshooting
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