Brother HL-5440D Service Manual page 278

To avoid problems caused by abrasion of the developer roller surface or deterioration of the
toner sealing, the machine prohibits printing when the number of rotations of the developer
roller reaches the limit, displaying a message prompting the user to replace the toner cartridge
before the toner runs out. The table below shows the limit of the number of rotations of the
developer roller.
Toner cartridge
Starter
Standard
High
Super high
<Life of toner cartridge>
The life of the toner cartridge based on the number of rotations of the developer roller (point
3 on the previous page) varies depending on the average number of pages printed per job
(see the table below). The number of printable pages is larger when performing continuous
printing in one job because deterioration of the developer roller is lower.
Number of rotations of developer roller per A4-size page
First page
Second page and after
(when performing
continuous printing)
Number of rotations of developer roller per operation
Warm-up operation after power ON or opening/closing
cover
Paper tray lift-up operation
Fuser unit warm-up operation
Fuser unit warm-up operation (max.) (in environment of low
voltage power supply and low temperature)
* The number of rotations varies according to individual differences in machines and
installation environment. The above data is for reference.
Note:
• The figures provided on this page are as of February 2012. These values are subject
to change without prior notice.
Limit for rotations of developer roller
102,000
144,000
Page
40/42PPM model (A4/Letter)
38/40PPM model (A4/Letter )
40/42PPM model (A4/Letter )
38/40PPM model (A4/Letter )
Operation
5-53
42,000
54,000
No. of
rotations
15.5
15.5
7.6
7.95
No. of
rotations
12
8.8
3.5
31.5
Confidential