Brother Laserprinter Color Hl 3450cn User Guide

CHAPTER 5 MAINTENANCE 
5-25 
8.  Move the Fusing Unit Pressure 
Release Levers to the SET 
position. 
 
Fig. 5-23 
9.  Install the Fuser Cleaner and the Oil Bottle into the new Fusing Unit and 
lock the Oil Bottle Lock Levers and the Fuser Cleaner Lock Levers. Be 
careful not to spill oil inside the printer. This could damage the printer. 
 
 
Note 
If the condition of the Fuser Cleaner is poor, we recommend that you replace 
the Fuser Cleaner at the same time as the Fusing Unit. The life counter for...

CHAPTER 5 MAINTENANCE 
5-26 
16. Press Set, and then press Go.  The printer is now in the READY state. 
 
 
! 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 
5-27 
1 1
1
2 2
2
0 0
0
K K
K
   
 
K K
KI I
I
T T
T   
 
120K Kit 
When you see the following message on the LCD panel, you must replace 
the items supplied in the 120K Kit, which includes the Paper Discharger. 
Note 
 User replacement of some of the following 120K Kit parts is not 
recommended. 
 We recommend that you contact your local Brother authorized dealer or 
service center for replacing the Paper Feeding Roller, Separator Pad 
and Transfer Drum.  
 We recommend you...

CHAPTER 5 MAINTENANCE 
5-28 
Paper Discharger 
! Caution 
Do NOT touch the charging wire! 
 
Fig. 5-24 
 
   Replacing the Paper Discharger 
1.  Press the Power button to turn the printer Off, and then unplug the 
printer. 
2.  Open the Rear Access Cover. 
3.  Remove the Paper Discharger 
from the Transfer Unit by lightly 
pressing it down and then sliding 
it to the right to release it from 
the catches. Hold the right hand 
side of the Discharging Unit and 
lift it up to remove it. 
 
Fig. 5-25  

CHAPTER 5 MAINTENANCE 
5-29 
4.  Install the new Paper Discharger 
into the Transfer Unit in the 
reverse order that you removed 
it. 
 
Fig. 5-26 
5.  Plug the power cord into the power outlet and press the Power button to 
turn on the printer. 
 
 
Note 
 User replacement of some of these parts is not recommended. 
 For replacement of the Paper Feeding Roller, Separator Pad and the 
Transfer Drum, consult your local dealer/retailer. 
 Actions 6 to 9 should only be carried out by your dealer or...

CHAPTER 5 MAINTENANCE 
5-30 
2 2
2
4 4
4
0 0
0
K K
K
   
 
K K
KI I
I
T T
T   
 
240K Kit 
When you see the following message on the LCD control panel, you must 
replace the items located in the 240K Kit, which includes the Drum Cleaner 
and the Transfer Roller. 
Note 
 User replacement of some of the following 240K Kit parts is not 
recommended. 
 For user replacement of the Drum Cleaner and Transfer Roller please 
refer to the instructions below. 
 We recommend that you contact your local Brother...

CHAPTER 5 MAINTENANCE 
5-31 
Replacing the Drum Cleaner 
! Caution 
Both ends of the Drum Cleaner roller consist of metal bearings that connect 
the bias element to the power supply. When you install the Drum Cleaner, 
the metal bearings must be connected correctly. Be sure to check how they 
are connected by referring to the old Drum Cleaner before you begin 
replacement. 
    
1.  Press the Power button to turn the printer Off, and then unplug the 
printer. 
2.  Open the Top Cover. 
3.  Remove the Drum...

CHAPTER 5 MAINTENANCE 
5-32 
 
5.  Install the new Drum Cleaner 
into the printer by gently placing 
the brass bearings into the 
guides, and then pushing the 
handle down until the bearings 
click into place. Ensure that the 
Drum Cleaner is free to move 
slightly upward (rotating slightly 
around the bearings) in the 
housing after you have installed 
it. 
 
Fig. 5-29 
6.  Re-install the Drum Cover, and then close the Top Cover. 
7.  
 Press any of the Menu buttons (+, –, Set or Back) to turn the...

CHAPTER 5 MAINTENANCE 
5-33 
Replacing the Transfer Roller 
1.  Release the Transfer Roller Lock 
Levers by lifting them up.  
 
Fig. 5-30 
2.  Hold the Transfer Roller Lock Levers 
to lift the used Transfer Roller up and 
out. 
 
Fig. 5-31
  

CHAPTER 5 MAINTENANCE 
5-34 
 
3.  Install the new Transfer Roller by 
holding the Lock Levers of the 
Transfer Roller and adjusting the 
angle of the Transfer Roller Lever 
shafts (both sides) to match the 
Transfer Unit groove.  Set the 
Transfer Roller onto the shafts and 
place the Roller onto the springs as 
shown below: 
 
Fig. 5-32 
 
         
 
Fig. 5-33 
        
 
Fig. 5-34 
4.  Lock the new Transfer Roller into place with the Transfer Roller Lock 
Levers. 
5.  Close the Rear Access Cover. 
6....