Dell S3840cdn User Manual page 223

9 Insert the cleaning rod fully into one of the four holes until it clicks into the interior of
the printer as illustrated below, and then pull it out.
NOTE:
• This cleaning step prevents deterioration of printing quality. See "Cleaning the Raster Optical
Scanner (ROS) Window".
10 Repeat step 9 also on the other three holes. One time insertion is enough for each
hole.
11 Return the cleaning rod to its original location.
12 Reinsert the removed waste toner box.
CAUTION:
• If the waste toner box does not fit into place properly, make sure that the drum cartridge is
fully inserted in the previous step.
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Maintaining Your Printer
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