Brother HL-3400CN Series User Manual page 178

11. Press the Power button to turn the printer On.
12. Press the Sel button and take the printer Off Line.
13. Press the Reset button while holding down the Shift button.
14. When you see "RESET PRINTER" on the LCD panel, press the
(UP) or (DOWN) button and select "RESET PARTS LIFE" . Press
the Set button and select "FUSER UNIT" with the
(DOWN) button.
15. Press the Set button, the printer is now On Line.
!
Caution
Please be careful when replacing the Fusing Unit. Do not place pressure
on the Fusing Unit; it should fit in easily. If it does not, make sure the
Fusing Unit connector is free to move.
Do not apply force! It could damage both the Fusing Unit and the printer.
CHAPTER 5 MAINTENANCE
(UP) or
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