168 Maintenance
11 Replace the other three toner cartridges as well.
12 Close the toner access cover.
13 Connect the power cord and turn on the printer.
Cleaning the Color Toner Density (CTD) Sensor
Clean the CTD sensor only when an alert for the CTD sensor is shown on the Printer Status window or LCD panel.
1 Turn off the printer and disconnect the power cord.
2 Push the rear cover handle and open the rear cover.
3 Clean the CTD sensor inside the printer with a clean dry cotton swab.
4 Close the rear cover.
5 Connect the power cord and turn on the printer.
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