4. Alignment and Troubleshooting
1)
Vertical Black Line and Band
•
Description : Straight thin black vertical line occurs in the printed image.
Cause and Check Point
Solution
Check if the surface of the charge roller is scratched or
contaminated.
Replace the corresponding toner cartridge and test again.
Check if there are grooves on the circumference of the
OPC drum.
Replace the corresponding toner cartridge and test again.
Check if the cleaning blade is damaged
Replace the corresponding toner cartridge and test again.
Check if paper transfer belt is damaged or contaminated.
Replace the ITB unit and test again.
2)
Vertical White Line
•
Description : White vertical voids in the image.
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 corresponding toner cartridge and test again.
Check if there are scratches on the circumference of the
developing roller.
Replace the corresponding toner cartridge and test again.
Check if paper transfer belt is damaged or contaminated.
Replace the ITB unit and test again.
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