Cartridges and drum unit?
the ink cartridges and drum unit is not the same kind of consumables. They can be used on the Brother machine. The Brother machine must be used at the same time the two materials.
what is the ink cartridges?
the powder (ink cartridges Toner) Is used to generate text and images.
when the toner is running or due to toner is about to run out of print quality becomes poor, you need to replace the ink cartridges.
the MFC - black and white laser printers The 7840 w ink cartridges
the MFC - color laser printers 9840 w ink cartridges ( Four color)
what is the drum unit?
drum unit is the toner transfer to the paper.
the laser printer ink cartridges on the roller drum unit called the drum, and then by heat and pressure to toner fixing in the paper to print words and images.
in order to ensure the best print quality, Brother machine will automatically detect the drum unit lower print quality. If Brother machines' replace the drum unit 'error message, you need to replace the drum unit.
the MFC - black and white laser printers Drum unit of 7840 w
the MFC - color laser printers 9840 w of selenium drum unit ( Four color)
how to use the ink cartridges and drum unit
to use the materials, please send the ink cartridges in selenium drum unit.
the ink cartridges into drum unit ( MFC - used in black and white laser printers 7840 w)
the ink cartridges into drum unit ( MFC - used in color laser printers 9840 w)
if the toner or ink cartridges/drum unit has all life, please separate toner and drum unit, only for materials that can not use new material.