Brother MFC 9450CDN User Manual

Troubleshooting and routine maintenance
151
C
lHold the green handle of the drum unit. 
Lift the drum unit up and then pull it out 
until it stops.
 
CAUTION 
We recommend that you place the drum 
unit and toner cartridges separately on a 
clean, flat surface with a piece of 
disposable paper underneath them in case 
you accidentally spill or scatter toner.
 
 
 
 
Handle the toner cartridge carefully. If toner 
scatters on your hands or clothes, wipe or 
wash it off with cold water at once.
 
 

152
mRelease the grey lock lever (1) that is on 
the left side of the machine. Lift the front 
of the drum unit and pull the drum unit 
completely out of the machine using the 
green handles on the drum unit.
 
CAUTION 
Make sure that you use the drum unit 
handles when carrying it.  DO NOT hold the 
sides of the drum unit.
 
 
nUsing their coloured handles to lift them 
out, remove all four toner cartridges 
from the drum unit.
 
CAUTION 
To prevent damage to the machine from 
static electricity, DO NOT...

Troubleshooting and routine maintenance
153
C
 
To avoid print quality problems, DO NOT 
touch the shaded parts shown in the 
illustrations.
 
 
 
 
oWhile holding both hands, turn the drum 
unit upside down and place on a piece of 
disposable paper or cloth. Make sure 
that the drum unit gears (1) are on your 
left hand side.
 
pSee the print sample to identify the 
colour causing the problem. The colour 
of the spots or toner stain is the colour of 
the drum you should clean. For 
example, if the spots...

154
qTurn the drum unit gear on the drum that 
matches that mark (for example, for a 
cyan mark, turn the drum for cyan). You 
should see the mark eventually on the 
surface of the drum (1).
 
rWhen you have found the mark on the 
drum that matches the print sample, 
wipe the surface of the drum gently with 
a cotton swab until the dust or paper 
powder on the surface comes off.
 
CAUTION 
The drum is photosensitive so DO NOT 
touch it with your fingers.
  
DO NOT clean the surface of the 
photosensitive...

Troubleshooting and routine maintenance
155
C
tHolding the toner cartridges by their 
coloured handles, insert them one by 
one back into the drum unit as shown. 
Make sure that you match the toner 
cartridge colour to the same colour label 
on the drum unit, and make sure that 
you fold down the toner cartridge 
handle (A) once the toner cartridge is in 
place. Repeat this for all the toner 
cartridges.
 
1 C - Cyan
2 M - Magenta
3 Y - Yellow
4K - Black
uPut the drum unit back in the machine as...

156
Note
When you put the drum unit in the 
machine, 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. 
vClose the front cover of the machine. 
wReconnect all cables and telephone line 
cord. Plug the AC power cord into an AC 
outlet, and then turn on the machine’s 
power switch.
2
1
2
1
 

Troubleshooting and routine maintenance
157
C
Replacing the consumable itemsC
When the time comes to replace consumable items, the following messages will appear on the LCD.
The machine will stop printing when the following maintenance messages appear on the LCD.
1The toner cartridge colour which is used up is shown in the message.
2At 5% print coverage (A4 or Letter size). The actual number of printed pages will vary depending on the print jobs and 
paper you use.
3At 5% print coverage for CMYK each (A4...

158
The following are maintenance messages that appear alternately with the normal message on the 
upper row of the LCD when the machine is in the Ready mode. These messages advise you that 
you will need to replace each of the consumable items as soon as possible, since the consumable 
item’s end of life has been reached. The machine will continue printing when any of these 
messages appear on the LCD.
1When printing on Letter or A4 size paper. The actual number of printed pages will vary depending on...

Troubleshooting and routine maintenance
159
C
Replacing a toner cartridgeC
Order Numbers:
Toner Cartridge Standard: 
TN-130 (BK, C, M, Y)
Toner Cartridge High Yield: 
TN-135 (BK, C, M, Y)
The High Yield toner cartridges can print 
approximately 5,000 pages (Black) and 
approximately 4,000 pages each (Cyan, 
Magenta and Yellow). The Standard toner 
cartridges can print approximately 2,500 
pages (Black) and approximately 1,500 
pages each (Cyan, Magenta and Yellow). 
Actual page count will vary depending...

160
aTurn off the machine’s 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.
 
cHold the handle of the toner cartridge 
and pull it out of the drum unit. Repeat 
this for all the toner cartridges.