Samsung SLC480FN

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.

3. Contamination on back of page

• Description : The back of the page is contaminated.

Cause and Check Point	Solution
Dirty registration roller, pressure roller, feed roller, etc. Any dirty rollers through the path of the paper.	Identify the roller which may cause the problem by comparing the period of the contamination on images with the size of rollers. Clean any dirt from the roller or replace the dirty roller.
Check if the transfer roller is damaged or contaminated.	Replace the transfer roller and test again.
Check if paper transfer belt is damaged or contaminated.	Replace the ITB unit and test again