Brother Hl 4070cdw User Manual

Rout i ne  Ma i nt e na nce
122
6
2Push the drum unit in until it stops. 
iClose the front cover.
 

Rout i ne  Ma i nt e na nce
123
6
Cleaning6
Clean the outside and inside of the printer regularly with a dry, lint-free cloth. When you replace the toner 
cartridge or the drum unit, make sure that you clean the inside of the printer. If printed pages are stained with 
toner, clean the inside of the printer with a dry, lint-free cloth.
Cleaning the outside of the printer6
WARNING 
Use neutral detergents. Cleaning with volatile liquids such as thinner or benzine will damage the surface of 
the printer....

Rout i ne  Ma i nt e na nce
124
6
cWipe the outside of the printer with a dry, lint-free cloth to remove dust. 
dRemove anything that is stuck inside the paper tray.
eWipe the inside of the paper tray with a dry, lint-free cloth to remove dust. 
fPut the paper tray back in the printer.
gPlug the printer back in, and then turn on the power switch.
Cleaning the inside of the scanner windows6
aTurn off the printer power switch and then unplug the printer. 
 

Rout i ne  Ma i nt e na nce
125
6
bPress the front cover release button and then open the front cover. 
cHold the green handle of the drum unit. Lift the drum unit up and then pull it out until it stops. 
dRelease the gray lock lever (1) that is on the left side of the printer. Pull the drum unit completely out of 
the printer using the green handles on the drum unit.
 
1
 

Rout i ne  Ma i nt e na nce
126
6
CAUTION 
Hold the green handles of the drum unit when you carry it. DO NOT hold the sides of the drum unit.
 
 
 
We recommend that you place the drum unit on a clean, flat surface with a piece of disposable paper 
underneath it in case you accidentally spill or scatter toner.
  
To prevent damage to the printer from static electricity, DO NOT touch the electrodes shown in the 
illustration.
 
 
eWipe the scanner windows (1) with a dry, lint-free cloth. 
1
 

Rout i ne  Ma i nt e na nce
127
6
fPut the drum unit back in the printer as follows.
1Make sure that the gray lock lever (1) is in the up position and put the drum unit in the printer. Push 
down the gray lock lever (1).
 
Note
When you put the drum unit in the printer, match the green guides (1) of the drum unit handle to the green 
arrows (2) on both sides of the machine.
 
 
2Push the drum unit in until it stops. 
gClose the front cover.
hPlug the printer back in, and then turn on the power switch....

Rout i ne  Ma i nt e na nce
128
6
Cleaning the corona wires6
If you have print quality problems, clean the corona wires as follows:
aTurn off the printer power switch. Press the front cover release button and then open the front cover. 
bHold the green handle of the drum unit. Lift the drum unit up and then pull it out until it stops. 
 

Rout i ne  Ma i nt e na nce
129
6
cHold the handle of the toner cartridge and pull it out of the drum unit. Repeat this for all the toner 
cartridges.
 
CAUTION 
We recommend that you place the toner cartridge on a clean, flat surface with a piece of disposable paper 
underneath it in case you accidentally spill or scatter toner.
  
DO NOT put a toner cartridge into a fire. It could explode, resulting in injuries.
  
Handle the toner cartridge carefully. If toner scatters on your hands or clothes, wipe...

Rout i ne  Ma i nt e na nce
130
6
dPush to release the latches of the white corona wire cover (1), and then open the cover. 
Note
We recommend that you clean the corona wire for each of the colors. If you want to clean only the corona 
wire of the color that caused the print quality problem, see the illustration below to identify the position of 
each of the corona wires.
   
1  Corona wire cover for Black (K)
2  Corona wire cover for Yellow (Y)
3  Corona wire cover for Magenta (M)
4  Corona wire cover...

Rout i ne  Ma i nt e na nce
131
6
eClean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to 
left several times. 
 
CAUTION 
Be sure to return the tab to the home position a (1). If you do not, printed pages may have a vertical stripe.
 
fClose the corona wire cover.  
gRepeat steps d to f to clean each of the remaining corona wires.
1
1
2
2
2
2
1
1
1
1
1
2
2
2
2
1
1
1
1