4. Troubleshooting
1) Vertical Black Line and Band
Description : Straight thin black vertical line occurs in the printed image.
Probable Cause
Solution
The paper is not the proper type.
Replace the paper.
The paper path is contaminated by toner residue, debris etc.
Clean the paper path.
The imaging unit is defective.
Replace the imaging unit.
The transfer roller is contaminated or worn out.
Replace the transfer roller.
The pressure roller or heat roller in fuser unit defective.
1) Turn the machine off.
2) Remove and replace the fuser unit.
3) Turn the machine on.
WARNING
Do not touch the fuser unit while it is hot.
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