4. Troubleshooting
4) Black and White spot
Description : Dark or blurry black spots occur periodically in the printing.
Probable Cause
Solution
The paper path is contaminated by toner residue, debris etc.
Clean the paper path.
The rollers in the imaging unit may be contaminated with
foreign matter or paper particles.
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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