Brother Copier/Printer MFC-9970CDW - Manual (Page 80)

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Replacing the consumable items
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The following messages appear on the LCD in the Ready mode. These messages provide
advanced warnings to replace the consumable items before they reach the end of their life. To
avoid any inconvenience, you may want to buy spare consumable items before the machine stops
printing.
Routine maintenance
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Toner cartridge Drum unit
See Replacing a Toner cartridge on page 68.
Order No. TN-310BK, TN-315BK, TN-310C,
TN-315C, TN-310M, TN-315M, TN-310Y, TN-315Y
See Replacing the drum unit on page 79.
Order No. DR-310CL
Belt unit Waste toner box
See Replacing the belt unit on page 86.
Order No. BU-300CL
See Replacing the waste toner box on page 92.
Order No. WT-300CL