Brother MFC 9120CN User Manual

							
Troubleshooting and routine maintenance169
C
bFully open the top cover by lifting up on 
the handle (1).
 
IMPORTANT
When the scanner is open, you cannot 
open the top cover.
 
cTake out the drum unit and toner 
cartridge assembly for the colour shown 
on the LCD.
 
dPush down the green-labelled lock 
lever (1) and take the toner cartridge out 
of the drum unit.
 
WARNING 
DO NOT put a toner cartridge into a fire. It 
could explode, resulting in injuries.
  
DO NOT use cleaning materials that 
contain ammonia, alcohol, any type of 
spray or any type of flammable substance 
to clean the inside or outside of the 
machine. Doing this may cause a fire or 
electrical shock. See Routine maintenance  
on page 155 for how to clean the machine.
 
 
Be careful not to inhale toner.
 
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170
IMPORTANT
• We recommend that you place the drum unit and toner cartridge assembly on a 
clean, flat, level, stable surface with a 
sheet of disposable paper or cloth 
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.
 
• Handle the toner cartridge 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 parts shown in the 
illustrations.
 
   
 
Note
• Be sure to seal up the toner cartridge 
tightly in a suitable bag so that toner 
powder does not spill out of the cartridge.
• Discard used consumable items  according to local regulations. If you 
choose not to return your used 
consumable, please discard the used 
consumable according to local 
regulations, keeping it separate from 
domestic waste. If you have questions, 
call your local waste disposal office.
 
eClean the primary 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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Troubleshooting and routine maintenance171
C
fUnpack the new toner cartridge. Gently 
shake it from side to side several times 
to distribute the toner evenly inside the 
cartridge.
 
IMPORTANT
• Unpack the toner cartridge just before you put it in the machine. If a toner cartridge is 
left unpacked for a long time, the toner life 
will be shortened.
• If an unpacked drum unit is put in direct  sunlight or room light, the unit may be 
damaged.
 
CAUTION 
HOT SURFACE
Put the toner cartridge in the drum unit 
immediately after you have removed the 
protective cover. To prevent any 
degradation to the print quality, DO NOT 
touch the shaded parts shown in the 
illustrations.
 
 
IMPORTANT
Brother machines are designed to work 
with toner of a particular specification and 
will work to a level of optimum performance 
when used with genuine Brother toner 
cartridges 
(TN-240BK/TN-240C/TN-240M/TN-240Y). 
Brother cannot guarantee this optimum 
performance if toner or toner cartridges of 
other specifications are used. Brother does 
not therefore recommend the use of 
cartridges other than genuine Brother 
cartridges with this machine, or the refilling 
of empty cartridges with toner from other 
sources. If damage is caused to the drum 
unit or other part of this machine as a result 
of the use of toner or toner cartridges other 
than genuine Brother products due to the 
incompatibility or lack of  suitability of those 
products with this machine, any repairs 
required as a result may not be covered by 
the warranty.
 
gPull off the protective cover. 
 
						

							
172
hPut the new toner cartridge firmly into 
the drum unit until you hear it lock into 
place. 
Note
Make sure that you put in the toner 
cartridge correctly or it may separate from 
the drum unit.
 
iSlide the drum unit and toner cartridge 
assembly into the machine. Make sure 
that you match the toner cartridge colour 
to the same colour label on the machine. 
 
 
C-Cyan M-Magenta Y-Yellow K-Black
jClose the top cover of the machine. 
 
h
 
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Troubleshooting and routine maintenance173
C
kPlug the machine’s power cord back into 
the electrical socket first, and reconnect 
all cables and the telephone line cord. 
Turn on the machine.
Note
DO NOT turn off the machine or open the 
top cover until the LCD returns to the 
Ready mode.
 
IMPORTANT
While removing the drum unit, handle it 
carefully because it may contain toner. If 
toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
 
Drum unitsC
A new drum kit (model no. DR-240CL) can 
print approximately 15,000 A4 or Letter size 
single-sided pages. The DR-240CL drum kit 
contains 4 drum units - 1 Black 
(DR-240CL-BK) and 3 Color 
(DR-240CL-CMY). As the drums rotate in 
unison during the various stages of operation 
(even if you are only printing in one colour) 
and because damage to a single drum unit is 
not likely, you will need to replace all of the 
drums at once. We have no control over the 
many factors that determine the actual drum 
life, therefore we cannot guarantee a 
minimum number of pages that will be printed 
by your drum. The printer should be used only 
in a clean, dust-free environment with 
adequate ventilation. Drum wear and tear 
occurs due to use and rotation of the drum 
and interaction with paper, toner and other 
materials in the paper path.
When a drum reaches the factory-established 
rotation limit corresponding to the rated page 
yield, the product LCD display will advise you 
to replace the applicable drum(s). The 
product will continue to function, however, 
print quality may not be optimal.
Drum End Soon messagesC
 
Drums End Soon
If the LCD shows  Drums End Soon , it 
means the drum kit is near the end of its life. 
Buy a new drum kit (DR-240CL) and have it 
ready before you get a Replace Drums 
message. To replace the drum units, see 
Replacing the drum units  on page 174.
IMPORTANT
For best performance, use only Genuine 
Brother drum units and Genuine Brother 
toner units. Printing with a third-party drum 
unit or toner unit may reduce not only the 
print quality but also the quality and life of 
the printer itself. Warranty coverage may 
not apply to problems caused by the use 
of a third-party drum unit or toner unit.
 
Note
 
Drum End Soon(X)
If only a specified drum is near the end of 
its life, the LCD shows the 
Drum End Soon(X)  message. (X) 
indicates the drum unit colour that is near 
the end of its life. ((K) =Black, (Y)=Yellow, 
(M)=Magenta, (C)=Cyan). Call your 
Brother dealer to buy a new drum unit 
DR-240CL-BK (for Black) or a 
DR-240CL-CMY (for either Y, M, C 
colours) and have it ready before you get 
a  Replace Drums  message. During the 
normal lifespan of a drum kit the 
Drum End Soon(X)  message will not 
appear. The message will only refer to a 
specific drum if a single unit has been 
replaced previously due to damage or 
error.
 
 
						

							
174
Replace Drums messagesC
When the following message appears on the 
LCD, you need to replace the drum kit:
 
Replace Drums
 
Drum Error
1Only the colour you need to replace will be shown
The Drum Error message has two cases: If 
the scrolling message shows 
Replace the Drum Unit. you will need 
to replace the drum unit. If the scrolling 
message shows 
Slide the Green tab on Drum Unit.  
you do not need to replace the drum unit, you 
just need to clean the corona wires. (See 
Cleaning the corona wires  on page 158.)
IMPORTANT
For best performance, use only Genuine 
Brother drum units and Genuine Brother 
toner units. Printing with a third-party drum 
unit or toner unit may reduce not only the 
print quality but also the quality and life of 
the printer itself. Warranty coverage may 
not apply to problems caused by the use 
of a third-party drum unit or toner unit.
 
Note
If only the specified drum needs to be 
replaced, the LCD shows the 
Replace Drum(X) message. (X) 
indicates the drum unit colour that you 
need to replace. ((K)=Black, (Y)=Yellow, 
(M)=Magenta, (C)=Cyan). During the 
normal lifespan of a drum kit the Replace 
Drum (X) message will not appear. The 
message will only refer to a specific drum 
if a single unit has been replaced 
previously due to damage or error.
 
Replacing the drum unitsC
IMPORTANT
• While removing the drum unit, handle it  carefully because it may contain toner. If 
toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
• Every time you replace the drum unit,  clean the inside of the printer. (See 
Routine maintenance  on page 155.)
 
aTurn off the machine. Unplug the 
telephone line cord first, and then 
unplug the power cord from the 
electrical socket.
bFully open the top cover by lifting up on 
the handle (1).
 

Replace the Drum Unit. Black/ Cyan/
Magenta/ Yellow. Refer to the 
User’s Guide.
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Troubleshooting and routine maintenance175
C
IMPORTANT
When the scanner is open, you cannot 
open the top cover.
 
cTake out the drum unit and toner 
cartridge assembly for the colour shown 
on the LCD.
 
dPush down the green-labeled lock 
lever (1) and take the toner cartridge out 
of the drum unit.
 
WARNING 
DO NOT put a toner cartridge into a fire. It 
could explode, resulting in injuries.
 
 
DO NOT use cleaning materials that 
contain ammonia, alcohol, any type of 
spray, or any type of flammable substance 
to clean the outside or inside of the 
machine. Doing this may cause a fire or 
electrical shock. See Routine maintenance  
on page 155 for how to clean the machine.
  
Be careful not to inhale toner.
 
IMPORTANT
• We recommend that you place the drum  unit and toner cartridge assembly on a 
clean, flat surface with a sheet of 
disposable paper or cloth 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.
 
• Handle the toner cartridge carefully. If toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
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176
• To avoid print quality problems, DO NOT touch the shaded parts shown in the 
illustrations.
 
 
 
 
Note
• Be sure to seal up the toner cartridge tightly in a suitable bag so that toner 
powder does not spill out of the cartridge.
• Discard used consumable items  according to local regulations. If you 
choose not to return your used 
consumable, please discard the used 
consumable according to local 
regulations, keeping it separate from 
domestic waste. If you have questions, 
call your local waste disposal office.
 
eUnpack the new drum unit and remove 
the protective cover.
 
IMPORTANT
Unpack the drum unit just before you put it 
in the machine. Exposure to direct sunlight 
or room light may damage the drum unit.
 
fPut the toner cartridge firmly into the new 
drum unit until you hear it lock into place.
IMPORTANT
Make sure that you put in the toner 
cartridge correctly or it may separate from 
the drum unit.
 
 
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Troubleshooting and routine maintenance177
C
gSlide the drum unit and toner cartridge 
assembly into the machine. Make sure 
that you match the toner cartridge colour 
to the same colour label on the machine. 
 
 
C-Cyan M-Magenta Y-Yellow K-Black
hClose the top cover of the machine.
Resetting the drum counterC
When you replace a drum unit with a new 
one, you need to reset the drum counter by 
completing the following steps:
aPlug the machine’s power cord back into 
the electrical socket first, and reconnect 
all cables and telephone line cord. Turn 
on the machine.
b(For MFC-9320CW) PressMenu, 8, 4.
(For MFC-9120CN) Press Menu, 6, 4. 
cPress  aor b to choose the colour of the 
drum you replaced. Press  OK.
dPress  1 to reset the drum unit counter.
ePress  Stop/Exit .
Replacing the belt unitC
Model name BU-200CL
A new belt unit can print approximately 
50,000 A4 or Letter size single-sided pages.
Belt End Soon messageC
 
Belt End Soon
If the LCD shows  Belt End Soon , it means 
the belt unit is near the end of its life. Buy a 
new belt unit and have it ready before you get 
a  Replace Belt  message. 
Replace Belt messageC
When the following message appears on the 
LCD, you need to replace the belt unit:
 
Replace Belt
IMPORTANT
•DO NOT touch the surface of the belt unit. 
If you touch it, it could degrade print quality.
• Damage caused by incorrect handling of 
the belt unit may void your warranty.
 
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aTurn off the machine. Unplug the 
telephone line cord first, and then 
unplug the power cord from the 
electrical socket.
bFully open the top cover by lifting up on 
the handle (1).
 
IMPORTANT
When the scanner is open, you cannot 
open the top cover.
 
cTake out all the drum unit and toner 
cartridge assemblies.
 
IMPORTANT
• We recommend that you place the drum unit and toner cartridge assembly on a 
clean, flat surface with a sheet of 
disposable paper or cloth 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.
 
• Handle the toner cartridge carefully. If toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
1