Brother MFC-8510DN, Service Manual, Page: 59 / 373

2-14
Confidential
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.
<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.
* The number of rotations varies according to individual differences in machines and
installation environment. The above data is for reference.
Toner cartridge Limit for rotations of developer roller
Starter 42,000
Standard 54,000
High 102,000
Super high 144,000
Number of rotations of developer roller per A4-size page
Page
No. of
rotations
First page 40/42PPM model (A4/Letter) 15.5
38/40PPM model (A4/Letter ) 15.5
36/38PPM model (A4/Letter ) 15.5
Second page and after
(when performing
continuous printing) 40/42PPM model (A4/Letter ) 7.6
38/40PPM model (A4/Letter ) 7.95
36/38PPM model (A4/Letter ) 8.35
Number of rotations of developer roller per operation
Operation
No. of
rotations
Warm-up operation after power ON or opening/closing
cover
12
Paper tray lift-up operation 8.8
Fuser unit warm-up operation 3.5
Fuser unit warm-up operation (max.) (in environment of low
voltage power supply and low temperature)
31.5
Note:
• The figures provided on this page are as of February 2012. These values are subject
to change without prior notice.