Brother International MFC-P2000 Service Manual - Page 82

I-9 White vertical streaks Possible cause Stains on the CIS window CIS unit failure Dirt on the document pressure bar Scratch on the document pressure bar Step Check 1 Are there any stains on the CIS window? 2 Is the problem solved after the CIS unit is replaced? 3 Are there any dirt on the document pressure bar? 4 Are there any scratches on the document pressure bar? Result Remedy Yes Clean the CIS window. Yes Replace the CIS unit. Yes Clean the document pressure bar. Yes Replace the document pressure bar. Possible cause Laser scanner window dirty Transfer failure Step 1 2 Check Is the scanner window dirty? Is the transfer roller scratched? Result Yes Yes Remedy Clean the scanner window with a dry tissue. Replace the drum unit. I-10 Faulty registration Possible cause Excessive paper load Print paper Ditto Paper registration sensor position incorrect Step 1 2 3 4 Check Is the paper loaded in the paper feeder more than 22 mm deep? Is the specified weight of the recommended paper being used? Is the first printing position within ±1 mm of the tolerance specification? Is the position of the paper registration sensor normal? Result Yes No Yes No Remedy Instruct the user to keep paper loads below 22 mm in depth. Instruct the user to use the recommended types of paper. Adjust the Y offset by using the utility software supplied. Reposition the sensor to the correct position. IV-13