Life Of Toner Cartridge And Drum Unit - Brother DCP-7055 Service Manual

2.6

Life of Toner Cartridge and Drum Unit

<Life of Toner Cartridge>
This product detects the remaining toner only by the dot count and the number of rotations of
the develop roller. The function to detect by the light sensor is not installed. As this machine
is not equipped with a toner sensor as conventional models are, it manages the level of
remaining toner by dot count during printing and the number of rotations of the develop roller.
Therefore printing may stop with the error message "Replace Toner" even though some toner
remains. Even if "Replace Toner" is displayed on the machine, printing can be continued if
the user chooses to change the mode to Continue Mode. In Continue Mode, however, the
printing result when the toner runs out is not assured, meaning that the user shall be
responsible for it. In addition to this, even when the mode is set to Continue Mode, printing
stops when the number of rotations of the develop roller reaches the upper limit, and remains
stopped until the toner cartridge is replaced to prevent any problems, such as toner leakage.
The life of the toner cartridge varies according to the average number of print pages per job.
(See the table below.) The number of printable pages is larger when making continuous
prints in one job because deterioration of the develop roller is low.
Relationship between average print page per 1 job and life of toner cartridges
26/27ppm model
Average print page (page/job)
Cartridge life (Starter)
Cartridge life (Standard)
Cartridge life (High-capacity)
24ppm model
Average print page (page/job)
Cartridge life (Starter)
Cartridge life (Standard)
Cartridge life (High-capacity)
20/21ppm model
Average print page (page/job)
Cartridge life (Starter)
Cartridge life (Standard)
Cartridge life (Standard) (HL-2220)
Cartridge life (High-capacity) (HL-2220)
The develop roller also rotates for the warm-up operation when the power is turned ON and
when the cover is opened or closed. Therefore, when these operations are frequently
performed, the life of toner cartridges is shortened. (The table below shows the worst case in
which the warm-up operation is performed when the power is turned ON.)
1 2 3
630 950 1200
1080 1600 2000
2340 3500 4300
1 2 3
630 930 1100
1080 1600 2000
2340 3500 4200
1 2 3
630 930 1100
900 1300 1600
1080 1600 2000
2340 3500 4200
2-11
· · · Continuance
2100
3600
7800
Page
· · · Continuance
2000
3400
7400
Page
· · · Continuance
2000
2900
3500
7600
Page
Confidential