Brother International DCP 8040 Service Manual - Page 242
Dirt on the back of paper
UPC - 012502610328
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I-5 Dirt on the back of paper MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN SERVICE MANUAL Possible cause Fixing unit dirty Dirt in the drum unit Step Check 1 Is the pressure roller dirty? Is any other area in the machine dirty? 2 Is the transfer roller dirty? Is the problem solved after replacing the drum unit? Result Yes Remedy Clean the pressure roller referring to the following procedure. Yes Replace the drum unit No Replace the high-voltage power supply PCB. NOTE: This problem may disappear after printing approximately 10 pages of completely blank sheets. How to clean the pressure roller Clean the pressure roller as follows (1) Set ten or more sheets of paper in the paper tray. (2) Check the absence of paper in the ADF and on the scanner glass. (3) Press Copy button to copy and repeat it five times. (4) Check whether any stain are observed on the back of paper or not. 6-39