Service manual

Image Defect Troubleshooting (Defect of the Print)
M085/M086 6-56 SM
12 White vertical streaks
User Check
1. Clean the scanner windows of the laser unit with a soft lint-free cloth. (
p.6-46 "1 Light")
2. Replace the toner cartridge with a new one.
3. Check the machine’s environment. High temperature and high humidity conditions can
cause this problem.
4. Damp (wet) paper might be used. Try to change to freshly unpacked paper.
5. Check there is no dust in the gap between the toner cartridge and drum frame.
Possible cause and Remedy
1. Condensation
 Has condensation occurred inside the machine?
Yes: Try to print several pages or leave the machine 2 hours to allow it to reach room
temperature.
2. Dirt on scanner windows
 Is the scanner windows dirty?
Yes: Clean the scanner windows.
3. Transfer failure
 Is the transfer roller scratched?
Yes: Replace the drum unit.
4. Scanner window of laser unit failure
 Is the problem solved after replacing the laser unit?
Yes: Replace the laser unit.