Brother HL-4200CN Service Manual page 356

APPENDIX 2 CONSUMABLES REPLACEMENT
Printhead Unit
The life is 30,000-page (@ C:5%, M:5%, Y:5% , K:5%). The life will change by "Coverage"
and "Job".
1.Coverage
If the print coverage increased, the life decreases as below.
30,000-page
35,000
30,000
25,000
20,000
15,000
15,000-page
10,000
5,000
0
4 5 6 7 8 9 10
Coverage[%] vs Life[PV]
(Base on Dispense Time)
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Image Coverage[%]
20%
Life(PV)
40%