Brother DCP-8045D - Manual (Page 133)

SPECIFICATIONS S - 6
Consumable items
Toner Cartridge Life
Expectancy TN-540:
Standard Toner Cartridge - Up to 3,500*
pages
TN-570:
High Yield Toner Cartridge - Up to 6,700* pages
* (when printing letter size or A4 paper at 5% print coverage)
Toner life expectancy will vary depending upon the
type of average print job.
Drum Unit Life
Expectancy DR-510:
Up to 20,000 pages/drum unit
There are many factors that determine the actual
drum life, such as temperature, humidity, type of
paper, toner you use and number of pages per print
job.