Sharp MX-B402 MX-B402 MX-B402SC Operation Manual - Page 111

BEFORE USING THE MACHINE CLEANING THE LASER UNIT When the laser unit inside the machine becomes dirty, line patterns may form in the printed image. Follow the steps below to clean the laser unit. Identifying white lines caused by a dirty laser unit • White lines always appear in the same place. • The white lines are parallel to the direction of paper feeding. Direction of paper feeding White line • White 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 1 power, and then switch the main power switch to the off position. Open the front cover and remove the toner collection container. 2 ☞ REPLACING THE TONER COLLECTION CONTAINER (page 1-55) Remove the cleaning tool for the writing unit from the front cover. 3 1-70 Contents