Brother MFC 9440CN User Manual

Troubleshooting and routine maintenance
151
C
fWhile 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.
 
gSee the print sample to identify the 
colour causing the problem. The colour 
of the spots is the colour of the drum you 
should clean. For example, if the spots 
are cyan, you should clean the drum for 
cyan. Put the print sample in front of the 
drum, and the find the exact...

152
jTurn the drum unit gear toward you by 
hand to return it to the home position. 
The home position of each drum can be 
identified by matching the number on 
the drum unit gear to the same number 
on the side of the drum unit as shown in 
the illustration. Make sure that the 
number on each of the four drum unit 
gears matches the corresponding 
number on the side of the drum unit.
 
kHolding the toner cartridges by their 
coloured handles, insert them one by 
one back into the drum unit as shown....

Troubleshooting and routine maintenance
153
C
lPut the drum unit back in the machine as 
follows.
1Make sure that the grey lock 
lever (1) is in the up position and 
put the drum unit in the machine. 
Push down the grey lock lever (1).
 
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.
 
 
1
1
2
1
2
1
 

154
2Push the drum unit in until it stops. 
mClose the front cover of the machine. 
nReconnect all cables and telephone line 
cord. Plug the AC power cord into an AC 
outlet, and then turn on the machine’s 
power switch.
 

Troubleshooting and routine maintenance
155
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...

156
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 maintenance157
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...

158
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.
 
 

Troubleshooting and routine maintenance
159
C
CAUTION 
We recommend that you place the toner 
cartridges 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 cartridges into a fire. It 
could explode, resulting in injuries.
  
Handle the toner cartridges carefully. If 
toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
  
To avoid print quality problems, DO NOT 
touch the shaded...

160
CAUTION 
DO NOT use flammable substances near 
the machine. DO NOT use any type of 
spray to clean the inside or outside of the 
machine. Doing this may cause a fire or 
electrical shock. Refer to Routine 
maintenanceon page 138 for how to clean 
the machine.
 
dClean the corona wires as follows.
1Push to release the latches of the 
white corona wire cover (1), and 
then open the cover.
 
2Clean the corona wire inside the 
drum unit by gently sliding the 
green tab from left to right and right 
to...