3 Your printer automatically picks up a sheet of paper from thepaper tray and prints out a cleaning sheet with the dust or tonerparticles on it.6.5M AINTAINING Y OUR P RINTER5 Reinsert the toner cartridge and close the top cover. Then, turnthe printer on.Cleaning the PrinterPrinting a cleaningsheetPrinting a cleaning sheet cleans the drum inside the tonercartridge. Use this process if you are experiencing blurred,faded or smeared printouts. This process will produce a pagewith toner debris, which should be discarded.1 Make sure the printer is turned on and in the ready state andthat there is paper loaded in the paper tray.2 Press and hold Demo on the control panel for about 10 secondsuntil all control panel lights remain steadily lit, then release.4 Locate the long strip of glass (LSU) inside the top of thecartridge compartment, and gently swab the glass to see if dirtturns the white cottom black.