Brother HL-1240, Service Manual

Page: 275 / 333

CHAPTER 3 MAINTENANCE
3-9
How to replace the Drum Unit
The printer uses a drum unit to create the print images on paper. If the Drum LED
is on, it indicates the drum unit is nearly at the end of its life. We recommend you
obtain a new drum unit to replace the current one. Even if the
Drum LED is on,
you may be able to continue to print without replacing the drum unit for a while. If
there is a noticeable deterioration in the output print quality even before the
Drum
LED lights, then the drum unit should be replaced.
Drum
Ready
Alarm
Paper
Toner
Data
Fig. 3-12 Drum unit nearly at the end of its Life
!
Caution
•
When removing the drum unit, handle it carefully as it may contain toner.
•
You should clean the printer when you replace the drum unit . See “How to
clean the printer” in this chapter and in the instructional video on the supplied
CD-ROM.
✒
Note
•
The drum unit is a consumable, and it is necessary to replace it periodically.
•
There are many factors that determine the actual drum life, such as temperature,
humidity, type of paper and toner that you use, the number of pages per print
job, etc. Under ideal conditions, the average drum life is estimated at
approximately 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 factors that determine the actual drum life, we cannot guarantee a
minimum number of pages that will be printed by your drum.
•
For best performance, use only genuine Brother toner. The product should only
be used in a clean, dust-free environment with adequate ventilation.