Brother MFC 9420CN User Manual

							Chapter C
C - 26
Replacing the consumable items
You will need to replace the following consumable items regularly. 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.
The following are maintenance messages that appear on the LCD in the Ready mode. These 
messages provide advanced warnings to replace the consumable items before they run out. To 
avoid any inconvenience, you may wish to buy spare consumable items before the machine stops 
printing.
Note
The toner cartridges that come supplied with this machine are starter toners.
Starter toners, are toner car tridges with approx. half the page yield of the standard toner cartridge, 
approx. 5,000 pages (Black) and approx. 3,000 pages (Cyan, Magenta and Yellow) at 
approximately 5% print coverage (Letter/A4 size).
LCD messages Consumable item  to replaceApproximate life1How to 
replaceOrder No.
Toner cartridge
X  =  C, M , Y , K
C  = Cyan, 
M  = Magenta,
Y  = Yellow,
K  = Black 10,000 pages (Black)
2
6,600 pages (Cyan, 
Magenta, Yellow)2
See 
Toner 
empty 
message  on 
page C-29. TN-04BK
TN-04C
TN-04M
TN-04Y
Waste toner pack 12,000 images See  Waste 
toner pack 
full message  
on 
page C-31. WT-4CL
LCD message Consumable part  to replaceApproximate life
1How to 
replaceOrder No.
Toner cartridge
X  =  C, M , Y , K
C  = Cyan, 
M  = Magenta,
Y  = Yellow,
K  = Black 10,000 pages (Black)
2
6,600 pages (Cyan, 
Magenta, Yellow)2
See 
Toner 
nearly empty 
message  on 
page C-28. TN-04BK
TN-04C
TN-04M
TN-04Y
Toner Empty    X
Waste Toner Full
Toner Low      X
 
						

							Troubleshooting and routine maintenance
C - 27
C
The following are maintenance messages that appear alternatively 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.
1Definition of pages: actual output page number.
Definition of images: 
If the image on a page contains only one color of either Cyan, Magenta, Yellow or Black =>1 image, 
two colors => 2 images, three colors => 3 images, four colors => 4 images.
2At 5% coverage print (Letter/A4 size). LCD messages Consumable part 
to replaceApproximate life
1How to 
replaceOrder No.
Waste toner pack 12,000 Images See C-31. WT-4CL
OPC belt cartridge 60,000 images
(Continuously printed)See C-33. OP-4CL
Fusing unit 60,000 pages
2See C-35. FP-4CL
Transfer belt 
cleaner
Transfer roller
Paper pick-up roller
Separator pad
Transfer belt120,000 pages
2Call Brother 
Customer 
Service to 
replace the 
120K kit.
Paper feeding kit 2.
(Paper pick-up 
roller 
Separator pad)Call Brother 
Customer 
Service to 
replace the 
paper 
feeding kit 2.
Near Waste Toner
Replace OPC Belt
Replace Fuser
Replace 120K Kit
Replace PF Kit2
 
						

							Chapter C
C - 28
Note
■Discard the used consumable item according to local regulations, keeping it separate from 
domestic waste. If you have questions, call your local waste disposal office. Be sure to re-seal 
the consumable item tightly so that the material inside does not spill. 
■We recommend placing used consumable items on a piece of paper or cloth to prevent 
accidentally spilling or scattering the material inside.
■If you use paper that is not a direct equivalent for the recommended paper, the life of 
consumable items and machine parts may be reduced.
■The projected life for each of the items listed is based on an average of 5% coverage of the 
printable area using any color toner cartridge. Frequency of replacement will vary depending 
on the complexity of printed pages, percentage of coverage and type of media used.
Toner cartridges
A new toner cartridge contains enough toner 
to print approx. 10,000 pages for Black and 
approx. 6,600 pages for Cyan, Magenta and 
Yellow Letter/A4-size single-sided pages at 
about 5% coverage.
Note
■The amount of toner used varies 
depending on how much print is on the 
page and the print density setting.
■If you change the print density setting for 
lighter or darker printing, the amount of 
toner that is used will change.
Toner nearly empty message
Check printed pages, page counter, and 
display messages regularly. If you see the 
message below, the machine has nearly run 
out of the indicated toner or the indicated 
toner is not evenly distributed inside the 
cartridge. Make sure you have a new toner 
cartridge ready for replacement.
X = C, M, Y, K
C stands for Cyan, M stands for Magenta and 
Y stands for Yellow, K stands for Black.
Although you can print approx. 300 (Black) 
and approx. 500 (Cyan, Magenta and Yellow) 
additional pages (at 5% coverage) after the 
Toner Low message first appears, you 
should replace the toner cartridge with a new 
one before it becomes completely empty.
Toner Low      X
 
						

							Troubleshooting and routine maintenanceC - 29
C
Toner empty message
When the following message appears on the 
LCD and the machine stops printing, you 
need to replace the toner cartridge.
Replacing a toner cartridge
The toner cartridge can print approx. 10,000 
pages for Black, 6,600 pages for Cyan, 
Magenta and Yellow. When the toner 
cartridge is running low, the LCD show the 
below message. X shows the toner color that 
is nearly empty. (C = Cyan,  M = Magenta, 
Y  = Yellow,  K = Black) When the toner 
becomes empty, this message will change to 
Toner Empty X.
Actual page count will vary depending on 
your average type of document (i.e., standard 
letter, detailed graphics).
Note
We recommend that you clean the machine 
when you replace a toner cartridge. 
WARNING
Do not put the toner cartridge into a fire. It 
could explode.
Toner Empty    X
Toner Low      X
CAUTION
■Brother strongly recommends that you 
do not refill the toner cartridges 
provided with your machine. We also 
strongly recommend that you continue 
to use only Genuine Brother Brand 
replacement toner cartridges. Use or 
attempted use of potentially 
incompatible toner and/or cartridges in 
the Brother machine may cause 
damage to the machine and/or may 
result in unsatisfactory print quality. 
Our warranty coverage does not apply 
to any problem that is caused by the 
use of unauthorized third party toner 
and/or cartridges. To protect your 
investment and obtain premium 
performance from the Brother 
machine, we strongly recommend the 
use of Genuine Brother Supplies.
■Printing with a third-party toner or 
third-party toner cartridges may reduce 
not only the print quality but also the 
quality and life of the machine itself. It 
may also cause serious damage to the 
performance and life of a OPC belt 
cartridge. Warranty coverage does not 
apply to problems caused by the use of 
third-party toner or third-party toner 
cartridges.
■Wait to unpack the toner cartridge until 
immediately before you install it in the 
machine. If a toner cartridge is left 
unpacked for a long period of time, the 
toner life is shortened.
 
						

							Chapter C
C - 30
How to replace a toner cartridge
1Open the front cover of the machine.
2Pull out the used toner cartridge.
3Take the new toner cartridge out of the 
box. 
Note
■Discard the used toner cartridge 
according to local regulations, keeping it 
separate from domestic waste. 
■Be sure to seal the toner cartridge tightly 
so toner powder does not spill out of the 
cartridge. If you have questions, call your 
local waste disposal office. 
4Hold the cartridge level with both hands 
and gently rock it from side to side three 
to four times to spread the toner evenly 
inside the cartridge. Remove the tape 
labeled REMOVE and the orange 
protective cover from the new toner 
cartridge.
Note
■Wait to unpack the toner cartridge until 
immediately before you put it in the 
machine. If toner cartridges are left 
unpacked for a long time, the toner life will 
be shortened.
■Put the toner cartridge into the machine 
immediately after you have removed the 
protective cover. To prevent degradation 
to the print quality, do not touch the 
shaded parts shown.
CAUTION
Handle the toner cartridge carefully. If 
toner scatters on your hands or clothes, 
immediately wipe or wash it off with cold 
water.
 
						

							Troubleshooting and routine maintenance
C - 31
C
5Put in the new toner cartridge by 
positioning it in the guide. Slide it gently 
into the machine. Do not try to push or 
lock the new toner cartridge in; it must 
rest loosely in the guide rails and will 
automatically be positioned properly 
when the front cover is closed. Note that 
each color cartridge is individually keyed 
to prevent improper installation. Match 
each cartridge color label to the same 
color label on the machine.
6Close the front cover.
Waste toner pack
After you have printed approximately 12,000 
images at 5% coverage, you must change the 
waste toner pack. When the waste toner pack 
is nearly full a warning message will be 
displayed.
Waste toner pack full message
When the waste toner pack is full, the 
following message appears on the LCD and 
the machine will stop printing. When you see 
this message, you must replace the waste 
toner pack.
CAUTION
■If you use consumable items other than 
genuine Brother supplies or if you use 
refilled toner cartridges, the machine 
could be damaged or might not work 
properly. This may void your warranty.
■Do not stand a toner cartridge on its 
end or turn it upside down.
K
Y
M
CK
Y
M
C
WARNING
■Do not re-use the waste toner pack.
■Do not put the waste toner pack into a 
fire. It could explode.
■Be careful not to spill the toner. Do not 
inhale or allow it to get into your eyes.
Near Waste Toner
Waste Toner Full
 
						

							Chapter C
C - 32
Replacing the waste toner pack
1Open the front cover of the machine.
2Remove the waste toner pack from the 
holder at the lower right hand side of the 
machine. Be careful not to spill the 
toner.
3Take the cap off the new waste toner 
pack, and put the cap on the used waste 
toner pack.
Note
■When you discard the used waste toner 
pack, place it in the plastic bag included 
with the replacement waste toner pack.
■Discard the used waste toner pack 
according to local regulations, keeping it 
separate from domestic waste. If you have 
questions, call your local waste disposal 
office.
4Put the new waste toner pack into the 
waste toner pack holder.
5Close the front cover.
CAUTION
Handle the waste toner pack carefully. If 
toner scatters on your hands or clothes, 
immediately wipe or wash it off with cold 
water.
 
						

							Troubleshooting and routine maintenance
C - 33
C
OPC belt cartridge
Replace OPC belt cartridge message
When the OPC belt cartridge runs out, the 
following message appears on the LCD. 
When you see this message, you must 
replace the OPC belt cartridge:
Replacing the OPC belt cartridge 
(OP-4CL)
1Turn off the machine’s power switch.
2Open the scanner unit.
3Open the inside cover so that it latches 
under the scanner unit.
4To release the lock, push the green belt 
cartridge lock levers on both sides 
inwards.
5Remove the OPC belt cartridge from the 
machine.
6Remove the tension release pins from 
both sides of the new OPC belt 
cartridge.
WARNING
■Do not touch the green film of the OPC 
belt cartridge. If you touch it, it could 
degrade print quality.
■Do not expose the OPC belt cartridge 
to bright room light or sunlight (a light 
source of 74.3 footcandles or 800 lux) 
for more than two minutes to avoid 
damaging the belt.
■Damage caused by improper handling 
of the OPC belt cartridge may void your 
warranty.
Replace OPC Belt
 
						

							Chapter C
C - 34
7Remove the protective sheet from the 
new OPC belt cartridge. Do not touch 
the green part of the OPC belt cartridge.
8Put the new OPC belt cartridge into the 
machine guides with the flat side facing 
you.
9To lock the cartridge into the machine, 
push the belt cartridge lock levers that 
are on both sides of the OPC belt 
cartridge outwards.
0Close the inside cover, and then close 
the scanner unit.
ATurn the machine’s power switch back 
on.
Reset the OPC belt life counter
1Press Menu/Set, 7, 4.
2Press ▲ or ▼ to select OPC Belt
and press Menu/Set.
The confirmation message appears on 
the LCD.
3Press 1 to reset the life counter.
—OR—
Press 2 to cancel.
OPC Belt
1.Reset 2.Exit
 
						

							Troubleshooting and routine maintenance
C - 35
C
Fusing unit
Replace fusing unit message
When the following message appears on the 
LCD, you must replace the fusing unit.
Replacing the fusing unit
1Turn off the machine’s power switch. To 
avoid injury, wait until the machine has 
cooled down sufficiently before you 
replace the fusing unit.
2Open the back cover (1) and the 
scanner unit (2) of the machine.
3To release the fusing unit from the 
machine, release the lock levers that are 
on both sides of the fusing unit.
WARNING
The fusing unit and the parts around 
it are hot! Be sure to wait until the 
fusing unit has cooled down 
sufficiently before replacing the 
fusing unit. If you touch the hot 
parts, you might get injured.
Replace Fuser