replace toner
remove the toner cartridge from the drum unit and replace it with a new one.
clean the corona wire in the drum unit using the blue tab.if you don't,printed pages may have a vertical stripe or "drum error"may occur.
do not use flammable substances,any type of spray or alcohol to clean the inside or outside of the machine.doing this may cause a fire or electrical shock.
slide the blue tab (1) on the drum unit from right to left and left to right several times.
be sure to return the blue tab to the home position (triangle mark).if you do not,printed pages may have a vertical stripe.
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