Cleaning The Raster Optical Scanner (Ros) Window - Dell C3765dnf Color Laser Printer User Manual

16 Close the right side cover.
17 Close the rear cover.

Cleaning the Raster Optical Scanner (ROS) Window

To prevent deterioration of printing quality due to stains inside the printer, clean inside the printer regularly by using
the cleaning rod whenever you replace drum cartridges.
1 Open the right side cover.
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Maintaining Your Printer