Sharp MX-C311 MX-C311 MX-C401 Operation Manual Suite - Page 46

REPLACING SUPPLIES AND MAINTENANCE Cleaning the laser unit When the laser unit inside the machine becomes dirty, line patterns (colored lines) may form in the printed image. Follow the steps below to clean the laser unit. Identifying lines (colored lines) caused by a dirty laser unit • Colored lines always appear in the same place. (The lines are never black.) • The colored lines are parallel to the direction of paper feeding. Direction of paper feeding Colored line • Colored lines appear not only on copies but also on print jobs from a computer. (The same lines appear on both copies and print jobs.) Press the [POWER] key ( ) on the operation panel to turn off the panel power, and then switch the main power switch to the off position. 1 43