Hello,
Two things can cause this type of problem, 1 bad drum unit or 2 dirty corona wire.
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Below are the directions to clean the wire.
1. Open the front cover and pull out the drum unit and
toner cartridge assembly.
2. Clean the primary corona wire inside the drum unit by gently sliding the blue
tab from right to left several times.
3. Return the blue tab and click it into the Home position.
4. Reinstall the drum unit and toner cartridge assembly in the MFC/Printer.
5. Close the front cover.
Be sure to return the sliding blue tab back to the home position next to the
arrow or you will have dark streaks on your printouts.
If this does not solve the problem then you will need to replace the transfer drum in the printer. The part number for the drum is DR-400 or DR400.
I hope this helps, if so please rate our solution.
Buddy
Corporate Computer
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If the backround is grey on the paper, its another indication to replace the toner cartridge.
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