Brother MFC 9120CN User Manual

Troubleshooting and routine maintenance149
C
Document jamsC
If the document is jammed, follow the steps 
below.
IMPORTANT
After removing a jammed document, 
check that no paper scraps are left in the 
machine that could cause another jam.
 
Document is jammed in the top of the 
ADF unit
C
aTake out any paper from the ADF that is 
not jammed.
bOpen the ADF cover.
cPull the jammed document out to the 
left.
 
dClose the ADF cover.
ePress Stop/Exit .
Document is jammed under the 
document cover
C
aTake out...

150
Paper jamsC
To clear paper jams, please follow the steps 
in this section.
IMPORTANT
Please confirm that you have installed all 
toner cartridges and drum units in the 
machine. Failure to install these items or 
incorrect installation may cause a paper 
jam in your Brother machine.
 
Note
If the error message remains, open and 
close the top cover and fuser cover firmly 
to reset the machine.
 
Note
The LCD names for the paper trays are as 
follows:• Standard paper tray:  Tray
• Manual Feed Slot:...

Troubleshooting and routine maintenance151
C
cMake sure the paper is below the 
maximum paper mark (b) of the paper 
tray. While pressing the green paper-
guide release lever, slide the paper 
guides to fit the paper size. Make sure 
that the guides are firmly in the slots 
(See  Loading paper in the standard 
paper tray  on page 11).
dPut the paper tray firmly back in the 
machine.
ePress Mono Start  or Colour Start  to 
resume printing.
Paper is jammed at the output paper 
tray
C
When the paper is...

152
Paper is jammed at the back of the 
machine
C
If the LCD shows Jam Rear, a paper jam 
has occurred behind the face-up output tray. 
Follow these steps:
aTurn off the machines power switch. 
Unplug the telephone line cord first, 
disconnect all cables, and then unplug 
the power cord from the electrical 
socket.
bOpen the back cover. 
CAUTION 
HOT SURFACE
After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. Wait at least 10 minutes for 
the machine to cool...

Troubleshooting and routine maintenance153
C
Paper is jammed inside the machineC
If the LCD shows Jam Inside, follow these 
steps:
aTurn off the machine. Unplug the 
telephone line cord first, disconnect all 
cables, and then unplug the power cord 
from the electrical socket.
bFully open the top cover by lifting up on 
the handle (1).
 
CAUTION 
HOT SURFACE
After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. Wait at least 10 minutes for 
the machine to cool...

154
• To avoid print quality problems, DO NOT touch the shaded parts shown in the 
illustrations.
 
 
 
 
dPull out the jammed paper slowly. 
eSlide each 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. 
Repeat this for all the drum unit and 
toner cartridge assemblies. 
 
 
C-Cyan M-Magenta Y-Yellow K-Black
fClose the top cover.
gPlug the machine’s power cord back into 
the electrical socket first,...

Troubleshooting and routine maintenance155
C
Routine maintenanceC
Clean the outside and inside of the machine 
regularly with a dry, lint-free cloth. When you 
replace the toner cartridge or the drum unit, 
make sure that you clean the inside of the 
machine. If printed pages are stained with 
toner, clean the inside of the machine with a 
dry, lint-free cloth.
WARNING 
Use neutral detergents. Cleaning with 
volatile liquids such as thinner or benzine 
will damage the surface of the machine.
  
DO NOT...

156
eWipe the inside and the outside of the 
paper tray with a dry, lint-free soft cloth 
to remove dust.
 
fRe-load the paper and put the paper tray 
firmly back in the machine.
gPlug the machine’s power cord back into 
the electrical socket first, and reconnect 
all cables and telephone line cord. Turn 
on the machine.
Cleaning the scanner glassC
aTurn off the machine. Unplug the 
telephone line cord first, disconnect all 
cables and then unplug the power cord 
from the electrical socket.
bLift the...

Troubleshooting and routine maintenance157
C
Cleaning the LED headsC
WARNING 
DO NOT use any flammable substances, 
spray or organic solvent/liquids containing 
alcohol/ammonia to clean the inside or 
outside of the machine. Doing this may 
cause a fire or electrical shock. For more 
information see Important Safety 
Instructions  on page 119.
 
IMPORTANT
DO NOT touch the windows of the LED 
heads with your fingers.
 
aBefore you clean the inside of the 
machine, turn off the machine. Unplug 
the...

158
Cleaning the corona wiresC
If you have print quality problems, clean the 
corona wires as follows:
aTurn off the machine. Unplug the 
telephone line cord first, disconnect all 
cables, 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 the drum unit and toner 
cartridge assemblies.
 
IMPORTANT
• We recommend that you place the drum unit and toner...