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Cleaning the Toner Density Sensor
Clean the machine when the error message instructing you to do so appears.
This procedure explains how to clean the toner density sensor of the yellow print cartridge as an example
of how to clean a sensor.
● The inside of this machine becomes very hot. Do not touch the parts labelled “ ” (indicating a hot surface).
Pull up the lever on the top cover, and then carefully raise the top cover.
Make sure that the ADF is closed.
Lift out the rearmost print cartridge.
Slide the toner density sensor lever once to the left.
Slide the lever only once.
Carefully insert the print cartridge removed in step vertically.
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