Brother HL-1650/1670N - Manual (Page 156)

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☛ ☛ ☛ ☛ 7.
Reset the page counter referring to the instructions supplied with the new
Drum unit.
✒ ✒ ✒ ✒
Note
Do not reset the page counter when you replace only the Toner cartridge.
☛ ☛ ☛ ☛ 8.
Close the Front cover.
✒ ✒ ✒ ✒
Note
We recommend that you clean the printer when you replace the Drum unit.
See “How to clean the printer” in this chapter.