Brother MFC 9970CDW - Manual (Page 70)

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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 66.
Model Name: TN-340BK, TN-348BK, TN-340C,
TN-345C, TN-348C, TN-340M, TN-345M,
TN-348M, TN-340Y, TN-345Y, TN-348Y
See Replacing the drum unit on page 72.
Model Name: DR-340CL
Belt unit Waste toner box
See Replacing the belt unit on page 79.
Model Name: BU-300CL
See Replacing the waste toner box on page 85.
Model Name: WT-300CL