C400 Operation-Manual Maintenance-Safety-Guide GB

REPLACING SUPPLIES AND MAINTENANCE

Cleaning the laser unit

When the laser unit inside the machine becomes dirty, line patterns (coloured

lines) may form in the printed image. Follow the steps below to clean the laser

unit.

Identifying lines (coloured lines) caused by a dirty laser unit

• Coloured lines always appear in the same place. (The lines are never black.)

• The coloured lines are parallel to the direction of paper feeding.

• Coloured lines appear not only on copies but also on print jobs from a

computer. (The same lines appear on both copies and print jobs.)

Coloured line

Direction of

paper feeding

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.