Brother MFC-9420CN Service Manual page 240

• 120K KIT: Life 120,000 pages
It is not changed.
• Pick-up roller (machine / LFU): Life 120,000 pages
Although the indication of the pick-up roller which is used in printing is not
changed, the indication of the other one which is not used is increased in
accordance with the number of print pages.
1) OPC Belt Cartridge
Life: 60,000 images
Condition: Above figure varies depending on pages/job. Refer to the list below.
Pages per job
Pages per job
Pages per job
2) Fusing Unit
Life: 60,000 images
Condition: Above figure varies depending on coverage. Refer to the list below.
Coverage
Additional life deleted
Life (pages)
1 page 2 page
24,000 30,000
7 page 8 page
49,000 51,000
13 page 14 page
58,000 59,000
∼ 12.5% 12.5% ∼ 20%
0 0.2
60,000 50,000
8 -3 3
3 page 4 page
35,000 39,000
9 page 10 page
53,000 54,000
15 page ∼
60,000
20% ∼ 40%
0.5
40,000
5 page 6 page
43,000 46,000
11 page 12 page
56,000 57,000
40% ∼ 60% 60% ∼
1 2
30,000 20,000
Confidential