Brother DCP 7040 User Manual

Troubleshooting and routine maintenance63
B
Cleaning the scanner glassB
aTurn off the machine’s power switch. 
Disconnect all cables and then unplug 
the power cord from the electrical 
socket. 
bLift the document cover (1).
Clean the white plastic surface (2) and 
scanner glass (3) underneath it with a 
soft lint-free cloth moistened with water.
 
c(DCP-7040 and DCP-7045N) In the 
ADF unit, clean the white bar  (1) and the 
scanner glass strip (2) underneath it 
with a soft lint-free cloth moistened...

64
bOpen the front cover and slowly take out 
the drum unit and toner cartridge 
assembly.
 
 
WARNING
HOT SURFACE
 After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. To prevent injury, when you 
open the front or back cover (back output 
tray) of the machine, DO NOT touch the 
shaded parts shown in the illustration.
   
 
CAUTION 
To prevent damage to the machine caused 
by static electricity, DO NOT touch the 
electrodes shown in the illustration....

Troubleshooting and routine maintenance65
B
cWipe the laser scanner window by 
wiping it with a clean soft, dry lint-free 
cloth.
 
dPut the drum unit and toner cartridge 
assembly back in the machine.
 
eClose the front cover.
fPlug the machine’s power cord back into 
the electrical socket. 
Turn on the machine’s power switch.
Cleaning the corona wireB
If you have print quality problems, clean the 
corona wire as follows:
aTurn off the machine’s power switch. 
Disconnect all cables, and then unplug...

66
 
To prevent damage to the machine caused 
by static electricity, DO NOT touch the 
electrodes shown in  the illustration.
 
 
dClean the corona wire inside the drum 
unit by gently sliding the green tab from 
right to left and left to  right several times.
 
CAUTION 
Be sure to return the  green tab to the home 
position ( a) (1). If you do not, printed pages 
may have a vertical stripe.
 
ePut the drum unit and toner cartridge 
assembly back in the machine.
fClose the front cover.
gPlug the...

Troubleshooting and routine maintenance67
B
Cleaning the drum unitB
If you have print quality problems, clean the 
drum unit as follows.
aTurn off the machine’s power switch. 
Unplug the power cord from the 
electrical socket. 
bOpen the front cover. 
cSlowly take out the drum unit and toner 
cartridge assembly.
 
CAUTION 
We recommend that you put the drum unit 
and toner cartridge assembly on a clean, 
flat surface with a piece of disposable paper 
or cloth underneath it in case you 
accidentally...

68
ePut the print sample in front of the drum 
unit, and find the exact position of the 
poor print.
 
fTurn the drum unit gear by hand while 
looking at the surface of the OPC 
drum (1).
 
gWhen you have found the mark on the 
drum that matches  the print sample, 
wipe the surface of the OPC drum with a 
dry cotton swab until the dust or glue on 
the surface comes off.
 
CAUTION 
The drum is photosensitive so DO NOT 
touch it with your fingers.
  
DO NOT clean the surface of the 
photosensitive drum...

Troubleshooting and routine maintenance69
B
Replacing the consumable itemsB
You will need to replace the consumable items wh en the machine indicates that the life of the 
consumable is over.
Note
• Discard used consumable items according to local regulations. (See  EU Directive 2002/96/EC 
and EN50419  on  page  39.) If you have questions, call  your local waste disposal office. Be sure 
to reseal the consumable it ems tightly so that the mate rial inside does not spill.
• We recommend placing used...

70
WARNING
HOT SURFACE
 After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. To prevent injury, when you 
open the front or back cover (back output 
tray) of the machine, DO NOT touch the 
shaded parts shown in the illustration.
 
 
 
aOpen the front cover. 
bSlowly take out the drum unit and toner 
cartridge assembly.
 
CAUTION 
We recommend that you put the drum unit 
and toner cartridge assembly on a clean, 
flat surface with a piece of disposable paper...

Troubleshooting and routine maintenance71
B
CAUTION 
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.
 
 
 
 
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-2110/TN-2120). Brother 
cannot...

72
fPut the new toner cartridge firmly into 
the drum unit until you hear it lock into 
place. If you put it in correctly, the lock 
lever will lift automatically.
 
CAUTION 
Make sure that you put in the toner 
cartridge correctly or it may separate from 
the drum unit.
 
gClean the corona wire of the drum unit 
by gently sliding the green tab from right 
to left and left to right several times.
 
CAUTION 
Be sure to return the  green tab to the home 
position ( a) (1). If you do not, printed pages...