Brother International MFC-P2000 Service Manual - Page 80

I-6 Black and blurred vertical streaks Possible cause Stains on the CIS window Dirt on the document pressure bar Scratch on the document pressure bar Step 1 2 Check Are there any stains on the CIS window? Is the document pressure bar dirty? 3 Are there any scratches on the document pressure bar? Result Remedy Yes Clean the CIS window. Yes Clean the document pressure bar. Yes Replace the document pressure bar. Possible cause Step Check Result Remedy Corona failure Corona failure Dirt in the paper feed system Scratch on the drum Cleaning failure Scratch on the heat roller 1 Is the corona wire dirty? Yes Clean the corona wire with the wire cleaner. 2 Is the vertical block streak Yes Return the wire about 10 mm wide? cleaner to its home Is the corona wire cleaner not position. in its home position? 3 Is the paper tray or feed Yes Clean the toner off. system on the drum unit soiled with toner? 4 Is the drum surface scratched? Yes Replace the drum unit. 5 Is the drum surface dirty with Yes Replace the drum toner in streaks? unit. 6 Is the surface of the heat roller Yes Replace the fixing scratched? unit. Note: If you print the same pattern continuously, the drum will be worn and black vertical streaks will appear on the paper. GND contacts (Fig.4-5) ➇ IV-11