Service manual

Image Defect Troubleshooting (Defect of the Print)
SM 6-53 M085/M086
Trouble –
shooting
8 Dirt on the back of paper
Possible cause and Remedy
1. Scratch or Dirt on the fuser unit
 Is the pressure roller ASSY dirty?
Yes: Print approximate 10 pages.
 Is any other area in the machine dirty?
No: Replace the fuser unit.
2. Scratch or Dirt in the paper feed system
 Is the paper feed system dirty?
Yes: Wipe dirt off.
9 Vertical streaks
User Check
1. This problem may occur with noise which is caused by dirt on the corona wire in the drum
unit. In this case, clean the corona wire with the wire cleaner.
2. Replace the drum unit with a new one.
3. Replace the toner cartridge with a new one.
Possible cause and Remedy
1. Scratch or Dirt in the paper feed system
 Is the paper feed system dirty?
Yes: Wipe dirt off.
2. Scratch or Dirt on the exposure drum
 Are there scratch and dirt on the surface of the exposure drum?
Yes: Replace the drum unit.
3. Scratch or Dirt on the heat roller
 Are there scratch and dirt on the surface of the heat roller?
Yes: Replace the fuser unit.