Cleaning The Laser Unit; Identifying Lines (Colored Lines) Caused By A Dirty Laser Unit - Sharp MX-4140N Operation Manual

USER'S MANUAL - APPENDIX

CLEANING THE LASER UNIT

Overview
When the laser unit inside the machine becomes dirty, line patterns
(colored lines) may form in the printed image. If line patterns
(colored lines) appear, 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.)
• Colored lines appear in parallel with the direction of paper
feeding.
• Colored lines appear not only on output from a copier but also
on prints from a computer. (The same lines appear on both
copies and print jobs.)
Operation
Open the front cover.
Take out the cleaning tool for the laser unit.
The cleaning tool is attached to the front cover.
(1) Pull the right-hand side of the cleaning tool to detach it from the
hook.
(2) Put it over the hook to place it on the back side.
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4/24/2014