Brother DCP 9040CN User Manual

Troubleshooting and routine maintenance
79
C
bIf paper is not caught inside the 
machine, check underneath the paper 
tray.
 
Note
DO NOT put the paper tray back in at this 
point.
 
cIf the paper is not caught in the paper 
tray, open the back cover.
 
dPush the gray lever on the left hand 
side (1) to the right.
 
HOT SURFACE 
After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. When you open the front or 
back cover of the machine, DO NOT touch 
the shaded...

80
gClose the back cover. 
hPut the paper tray firmly back in the 
machine.
 

Troubleshooting and routine maintenance
81
C
Routine maintenanceC
WARNING 
Use neutral detergents.
  
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. For more information see 
Important safety instructions on page 42.
 
CAUTION 
The drum unit contains toner, so handle it 
carefully. If toner scatters on your hands or 
clothes, wipe or wash...

82
eWipe the inside of the paper tray with a 
dry, lint-free 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 AC power outlet first, and reconnect 
all cables. Turn on the machine’s power 
switch.
Cleaning the scannerC
aTurn off the machine’s power switch. 
Disconnect all cables, and unplug the 
power cord from the AC power outlet.
bLift the document cover (1).
Clean the white plastic surface (2) and 
scanner...

Troubleshooting and routine maintenance
83
C Cleaning the laser scanner 
windowsC
CAUTION 
Use only a dry, lint-free cloth to clean the 
laser scanner windows.
  
DO NOT touch the laser scanner windows 
with your fingers.
 
aTurn off the machine’s power switch. 
Disconnect all cables, and unplug the 
power cord from the AC power outlet.
bPress the front cover release button and 
then open the front cover.
 
cHold the green handle of the drum unit. 
Lift the drum unit up and then pull it out 
until it...

84
dRelease 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.
 
HOT SURFACE 
After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. When you open the front 
cover of the machine, DO NOT touch the 
shaded parts shown in the illustration.
 
 
CAUTION 
Hold the handles of drum unit when you 
carry it. DO NOT hold the...

Troubleshooting and routine maintenance
85
C
 
To prevent damage to the machine from 
static electricity, DO NOT touch the 
electrodes shown in the illustration.
 
 
eWipe the scanner windows (1) with a 
dry, lint-free cloth.
 
fPut 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).
 
1
1
1
 

86
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.
 
 
2Push the drum unit in until it stops. 
gClose the front cover of the machine. 
hPlug the machine’s power cord back into 
the AC power outlet first, and reconnect 
all cables. Turn on the machine’s power 
switch.
2
1
2
1
 

Troubleshooting and routine maintenance
87
C
Cleaning the corona wiresC
If you have print quality problems, clean the 
corona wires as follows:
aTurn off the machine’s power switch. 
Disconnect all cables, and unplug the 
power cord from the AC power outlet.
bPress the front cover release button and 
then open the front cover.
 
cHold the green handle of the drum unit. 
Lift the drum unit up and then pull it out 
until it stops.
 
dHold the handle of the toner cartridge 
and pull it out of the drum unit....

88
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 cartridge 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 parts shown in the 
illustrations....