Brother Hl4570cdw Owners Manual

Routine Maintenance 
105
5
iTurn the green lock lever (1) clockwise to the lock position. 
jPush the drum unit in until it stops. 
kClose the front cover of the machine.
When you replace the drum unit with a new one, you need to reset the drum counter by completing the 
following steps:
aPress + or - to choose Machine Info.. Press OK.
bPress + or - to choose Reset Parts Life. Press OK.
cPress + to choose Drum Unit. Press OK.
dPress + to reset the drum unit counter.
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Routine Maintenance 
106
5
Belt unit5
Order No. BU-300CL
A new belt unit can print approximately 50,000 A4 or Letter size single-sided pages.
Belt End Soon message5
 
Belt End Soon
If the LCD shows Belt End Soon, it means the belt unit is near the end of its life. Buy a new belt unit and 
have it ready before you get a Replace Belt message.
Replace Belt message5
When the following message appears on the LCD, you need to replace the belt unit.
 
Replace Belt
IMPORTANT
Damage caused by incorrect handling...

Routine Maintenance 
107
5
bHold the green handle of the drum unit. Pull the drum unit out until it stops. 
cTurn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding 
the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
 
dHold the green handle of the belt unit with both hands and lift the belt unit up, then pull it out. 
1 

Routine Maintenance 
108
5
eUnpack the new belt unit and put the new belt unit in the machine. Make sure the belt unit is level and 
fits firmly into place.
 
fMake sure the green lock lever (1) is in the release position as shown in the illustration. 
gMatch the guide ends (2) of the drum unit to the c marks (1) on both sides of the machine, then gently 
slide the drum unit into the machine until it stops at the green lock lever.
 
1
1
2 

Routine Maintenance 
109
5
hTurn the green lock lever (1) clockwise to the lock position. 
iPush the drum unit in until it stops. 
jClose the front cover of the machine.
When you replace the belt unit with a new one, you need to reset the belt unit counter by completing the 
following steps:
aPress + or - to choose Machine Info.. Press OK.
bPress + or - to choose Reset Parts Life. Press OK.
cPress + or - to choose Belt Unit. Press OK.
dPress + to reset the belt unit counter.
1 

Routine Maintenance 
110
5
Waste toner box5
Order No. WT-300CL
The life of a waste toner box is approximately 50,000 A4 or Letter size single-sided pages.
WT Box End Soon message5
 
WT Box End Soon
If the LCD shows WT Box End Soon, it means the waste toner box is near the end of its life. Buy a new 
waste toner box and have it ready before you get a Replace WT Box message.
Replace WT Box message5
When the following message appears on the LCD, you need to replace the waste toner box.
 
Replace WT Box...

Routine Maintenance 
111
5
bHold the green handle of the drum unit. Pull the drum unit out until it stops. 
cTurn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding 
the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
 
dHold the green handle of the belt unit with both hands and lift the belt unit up, then pull it out. 
1 

Routine Maintenance 
112
5
eRemove two pieces of orange packing material and discard them. 
Note
This step is only necessary when you are replacing the waste toner box for the first time, and is not 
required for the replacement waste toner box. The orange packing pieces are installed at the factory to 
protect your machine during shipment.
 
fRemove the waste toner box from the machine using the green handle. 
gUnpack the new waste toner box and put the new waste toner box in the machine using the green...

Routine Maintenance 
113
5
hSlide the belt unit back into the machine. Make sure the belt unit is level and fits firmly into place. 
iMake sure the green lock lever (1) is in the release position as shown in the illustration. 
jMatch the guide ends (2) of the drum unit to the c marks (1) on both sides of the machine, then gently 
slide the drum unit into the machine until it stops at the green lock lever.
 
1
1
2 

Routine Maintenance 
114
5
kTurn the green lock lever (1) clockwise to the lock position. 
lPush the drum unit in until it stops. 
mClose the front cover of the machine.
1