Brother Hl 4150cdn User Manual

Routine Maintenance 115
5
cWipe the outside of the machine 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 machine.
gConnect interface cables and then plug the machine back in. Turn on the power switch.
 

Routine Maintenance 116
5
Cleaning the inside of the machine5
aTurn off the machines power switch. Disconnect all interface cables, and then unplug the AC power 
cord.
bPress the front cover release button and then open the front cover. 
cHold the green handle of the drum unit. Pull the drum unit out until it stops. 
dTurn 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...

Routine Maintenance 117
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IMPORTANT
• 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 machine from static electricity, DO NOT touch the electrodes shown in the  illustration.
 
 
eWipe the four scanner windows (1) with a dry, lint-free cloth. 
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Routine Maintenance 118
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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.
 
hTurn the green lock lever (1) clockwise to the lock position. 
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1
2
1
 

Routine Maintenance 119
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iPush the drum unit in until it stops. 
jClose the front cover of the machine.
kConnect interface cables and then plug the machine back in. Turn on the power switch.
 

Routine Maintenance 120
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Cleaning the corona wires5
If you have print quality problems, clean the corona wires as follows:
aPress the front cover release button and then open the front cover. 
bHold the green handle of the drum unit. Pull the drum unit out until it stops. 
cHold the handle of the toner cartridge and slightly push it toward the machine to unlock it. Then pull it out 
of the drum unit. Repeat this for all the toner cartridges.
 
 

Routine Maintenance 121
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dPush to release the latches of the corona wire cover (1), and then open the cover. 
eClean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to 
left several times. 
 
Note
Be sure to return the tab to the home position (a) (1). If you do not, printed pages may have a vertical stripe.
 
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Routine Maintenance 122
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fClose the corona wire cover.  
gRepeat steps d to f to clean each of three remaining corona wires.
hHold the handle of the toner cartridge and slide the toner cartridge into the drum unit then slightly pull it 
toward you until you hear it click into place. Make sure that you match the toner cartridge color to the 
same color label on the drum unit. Repeat this for all the toner cartridges.
   
C - Cyan
M - Magenta
Y - Yellow
K - Black
C
M
Y
K
 

Routine Maintenance 123
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iPush the drum unit in until it stops. 
jClose the front cover of the machine.
 

Routine Maintenance 124
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Cleaning the drum unit5
If your printout has colored spots at 94 mm (3.7 in.) intervals, the drum may have foreign material, such as 
glue from a label stuck on the drum surface. Follow the steps below to solve the problem.
aMake sure the machine is in the ready state.
bPress + or - to choose  Machine Info. . Press OK.
cPress +  or - to choose  Drum Dot Print . Press OK to print out the drum dot check sheet. 
dTurn off the machines power switch. Disconnect all interface cables,...