Brother DCP 9040CN User Manual

Troubleshooting and routine maintenance
109
C
CAUTION 
To prevent damage to the machine from 
static electricity, DO NOT touch the 
electrodes shown in the illustration.
 
 
 
Hold the handles of drum unit when you 
carry it. DO NOT hold the sides of the drum 
unit.
 
 
 
To avoid print quality problems, DO NOT 
touch the shaded parts shown in the 
illustrations.
 
 
 
 
dHold the handle of the toner cartridge 
and pull it out of the drum unit. Repeat 
this for all the toner cartridges.
 
 

110
CAUTION 
We recommend that you place the toner 
cartridges 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.
 
eUnpack the new drum unit and remove 
the protective cover.
 
fHold the handle of the toner cartridge 
and slide the toner cartridge into the 
drum unit. Make sure that you match the...

Troubleshooting and routine maintenance
111
C
gPut the drum unit back in the machine as 
follows.
1Make sure that the gray lock 
lever (1) is in the up position and 
put the drum unit in the machine. 
Push down the gray 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
 

112
2Push the drum unit in until it stops. 
hClose the front cover of the machine. 
When you replace the drum unit with a new 
one, you need to reset the drum unit counter 
by completing the following steps:
iTurn on the machine’s power switch.
jPress Menu, 5, 5.
The LCD shows the part name of the 
counter that needs to be reset.
 
Machine Info.
5.Reset Menu
kPress a or b to choose Drum.
Press OK.
lPress 1 to reset the drum unit counter.
mPress Stop/Exit.
Replacing the belt unitC
Order Number: BU-100CL...

Troubleshooting and routine maintenance
113
C
Replacing the belt unitC
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.
 
 

114
cRelease the gray 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 
Hold the handles of drum unit when you 
carry it. DO NOT hold the sides of the drum 
unit.
 
 
 
We recommend that you place the drum 
unit on a clean, flat surface with a piece of 
disposable paper underneath it in case you 
accidentally spill or scatter toner.
  
To prevent damage to...

Troubleshooting and routine maintenance
115
C
dHold the green parts of the belt unit with 
both hands and lift the belt unit up, then 
pull it out.
 
CAUTION 
We recommend that you place the belt unit 
on a clean, flat surface with a piece of 
disposable paper underneath it in case you 
accidentally spill or scatter toner.
 
eUnpack the new belt unit, and remove 
the protective cover and paper.
 
fPut the new belt unit in the machine. 
Match the h mark on the belt unit to the 
g mark on the machine. Push...

116
gPut the drum unit back in the machine as 
follows.
1Make sure that the gray lock 
lever (1) is in the up position and 
put the drum unit in the machine. 
Push down the gray 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
 

Troubleshooting and routine maintenance
117
C
2Push the drum unit in until it stops. 
hClose the front cover of the machine. 
When you replace the belt unit with a new 
one, you need to reset the belt unit counter by 
completing the following steps:
iTurn on the machine’s power switch.
jPress Menu, 5, 5.
The LCD shows the part name of the 
counter that needs to be reset.
 
Machine Info.
5.Reset Menu
kPress a or b to choose Belt Unit.
Press OK.
lPress 1 to reset the belt unit counter.
mPress Stop/Exit....

118
Replacing the waste toner boxC
WARNING 
DO NOT reuse the waste toner box.
  
DO NOT put the waste toner box into a fire. 
It could explode, resulting in injuries.
  
Be careful not to spill the toner. DO NOT 
inhale or allow it to get into your eyes.
 
CAUTION 
Handle the waste toner box carefully. If 
toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.
 
aPress the front cover release button and 
then open the front cover.
 
bHold the green handle of the drum unit....