Copy Has Vertical Black Streaks
06-Sep-2011
8200339000
Issue
Vertical black streaks appear on the output.
Cause and Solution
This section describes how to handle if the vertical black streaks appear on the output.
Make sure you load paper that meets the requirements for use.
NOTE
For information on the Paper Requirements, see "Paper Handling."
Clean the feeder roller, and the scanning area.
NOTE
For instructions on how to clean the machine, see "Cleaning the Machine."
The fuser roller in the main unit may be dirty. Should this occur, clean the fuser roller in the following procedure. The roller should also be cleaned each time the toner cartridge is replaced. Load a sheet of blank LTR paper into the multi-purpose tray and start cleaning.
NOTE
Use standard paper as the cleaning paper.
Cleaning the roller takes approximately 130 seconds.
When some jobs are stored in memory, this function is not available.
1. Press
[Menu].2. Press [
] or [ 
] to select 
3. Load a sheet of blank A4 paper in the multi-purpose tray.
For MF4380dn/MF4370dn
For MF4350d/MF4340d/MF4330d/MF4320d
4. Press [
] or [ ] to select 
Cleaning starts.
NOTE
Throw away the cleaning paper after use.
Make sure that the toner cartridges are properly installed.
NOTE
For instructions on how to install the toner cartridges, see "Installing the Toner Cartridge."