Brother 4000CN - Manual (Page 180)

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A A . . 4 4 L L i i f f e e S S p p a a n n o o f f C C o o n n s s u u m m a a b b l l e e I I t t e e m m s s
Life span of consumables (in printable pages)
Consumable Number of printable pages (*)
Black toner cartridge About 8,500 pages
Yellow toner cartridge About 6,000pages
Magenta toner cartridge About 6,000 pages
Cyan toner cartridge About 6,000 pages
Print Head Cartridge About 30,000 pages
Transfer roll cartridge
(includes waste toner collection box) About 25,000 pages
(*) The number of printable pages corresponds to the printing conditions in the table
below. The actual number of printable pages depends on the content of printed
material, the paper size, and the operating environment.
Differences in number of sheets printed may occur due to power on/off initialization
and print quality maintenance operation.
Paper Size A4 portrait
Coverage 5%
Monochrome/color ratio 1:1
Average number of sheets in a single print run 4