Brother International HL-1070 Service Manual - Page 75

I-8 Black vertical streaks (in the gray background) Possible cause Translucent stain on the scanner window Step Check 1 Are there any stains? I-9 White vertical streaks Result Yes Remedy Clean the scanner window. If it is not effective, replace the scanner unit. Possible cause 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 resist sensor position incorrect Step 1 2 3 4 Check Is the paper loaded in the paper feeder more than 22mm deep? Is the specified weight of the recommended paper being used? Is the first printing position within ±1mm of the tolerance specification? Is the position of the paper resist sensor normal? Result Remedy Yes Instruct the user to keep paper loads below 22mm in depth. No Instruct the user to use the recommended types of paper. Yes Adjust the Y offset by using the utility software supplied. No Reposition the sensor to the correct position. IV-11