Brother International MFC-9970CDW Advanced Users Manual - English - Page 76
Cleaning the drum unit
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i Push the drum unit in until it stops. j Close the front cover of the machine. Cleaning the drum unit A If your printout has colored dots or other repeating marks at 3.7 in. (94 mm) intervals, the drum may have foreign material, such as glue from a label stuck on the drum surface. Follow the steps below to solve the problem. a Make sure that the machine is in the Ready mode. b Press MENU. c Press a or b to display Print Reports. Press Print Reports. d Press a or b to display Drum Dot Print. Press Drum Dot Print. e The machine will display Press Start. Press Black Start or Color Start. f Turn off the machine's power switch. Unplug the telephone line cord first, disconnect all cables, and then unplug the power cord from the AC power outlet. 70