Alignment & Troubleshooting
Service Manual
4-39
Samsung Electronics
Vertical Black Line and Band
Vertical White Line
Cause and Check Point Solution
Check if the surface of the charge roller is scratched or
contaminated.
Replace the toner cartridge and test again
Check if there are grooves on the circumference of the
OPC drum.
Replace the toner cartridge and test again
Check if the cleaning blade is damaged Replace the toner cartridge and test again
Is the charge roller of PTB unit damaged?
Clean the charge roller of PTB unit, or replace the PTB
unit.
Check if paper transfer belt is damaged or
contaminated.
Replace the PTB unit and test again.
Cause and Check Point Solution
Check if the LSU window or internal lenses of LSU is
contaminated.
Clean the LSU window with recommended
cleaner(IPA). Clean the window with a clean cotton
swab. If dirt is inside the LSU, replace the LSU.
Check if there are scratches on the circumference of
the OPC drum.
Replace the toner cartridge.
Check if there are scratches on the circumference of
the developing roller.
Replace the toner cartridge.
Foreign objects inside the toner cartridge. Replace the toner cartridge.
Check if there are vertical scratches on the transfer
unit.
Replace the PTB unit.
Description
1. Straight thin vertical black lines occur in the printed image
2. Dark black vertical bands occurs in the printed image
Description
White vertical voids in the image.
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