Brother HL-1800 series - Manual (Page 131)

CHAPTER 5 MAINTENANCE
5-11
! CHANGE DRUM SOON Message
CHANGE DRUM SOON
The printer uses a Drum Unit to create the print images on paper. If the
display shows the above message, it means the Drum Unit is near the end
of its life. We recommend that you replace the Drum Unit with a new one
before there is a noticeable deterioration in the print quality.
! Replacing the Drum Unit
This printer can print upto 20,000 pages *1 with one Drum Unit.
*1 At 5% coverage print (A4-Letter size). The actual number of printed pages
may vary depending on the average type of print job and paper.
✒ ✒ ✒ ✒ Note
There are many things that affect how long the drum unit lasts for, such as
the temperature, humidity, type of paper, type of toner used, the number of
pages in each print job and so on. Under ideal conditions, a drum unit will
last for upto 20,000 pages. The actual number of pages that your drum will
print may be significantly less than this estimate. Because we have no
control over the many things that affect the actual drum life, we cannot
guarantee a minimum number of pages that your drum will print.
For best performance, only use genuine Brother toner. You should only use
the printer in a clean, dust-free environment with suitable ventilation.