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The drum is the carrier mechanism that you snap the toner cartridge out of and back into when you change the toner cartridge. It does not have to be changed as often as the toner, but the printer does tell you when to change it, as you have learned. You should be able to buy it at the same office supply store where you purchase toner cartridges.
Sorry, there was a problem. Please try again later.The "replace drum" means it's time to replace the drum unit. Here's a link below for instructions to replace the drum unit for the MFC-L2750DW. https://help.brother-usa.com/app/answers/detail/a_id/153747
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