Brother MFC 8890DW User Manual

140
Cleaning the laser scanner 
windowC
WARNING 
Use neutral detergents.
  
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 103.
 
IMPORTANT
DO NOT touch the laser scanner window 
with your fingers.
 
aBefore you clean the inside of the 
machine, turn off the machine. Unplug 
the telephone line...

Troubleshooting and routine maintenance
141
C
cWipe the laser scanner window (1) by 
wiping it with a dry lint-free soft 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 first, and then plug 
in the telephone line cord.Turn on the 
machine.
Cleaning the corona wireC
If you have print quality problems, clean the 
corona wire as follows:
aTurn off the machine. Unplug the 
telephone line...

142
cClean the corona wire inside the drum 
unit by gently sliding the blue tab from 
right to left and left to right several times.
 
Note
Be sure to return the blue tab to the home 
position (a) (1). If you do not, printed 
pages may have a vertical stripe.
 
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 first, and then 
reconnect all cables and telephone line 
cord. Turn on the machine....

Troubleshooting and routine maintenance
143
C
Cleaning the drum unitC
If you have print quality problems, clean the 
drum unit as follows.
aTurn off the machine. Unplug the 
telephone line cord first, and then 
unplug the power cord from the 
electrical socket. 
bOpen the front cover and slowly take out 
the drum unit and toner cartridge 
assembly.
 
IMPORTANT
• We recommend that you put the drum unit 
and toner cartridge assembly on a clean, 
flat surface with a sheet of disposable 
paper or cloth...

144
eTurn the drum unit gear by hand while 
looking at the surface of the OPC 
drum (1).
 
fWhen 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.
 
IMPORTANT
• The drum is photosensitive so DO NOT 
touch it with your fingers.
• DO NOT clean the surface of the 
photosensitive drum with a sharp object.
• DO NOT use excessive force when 
cleaning the drum unit.
 
gPut the toner...

Troubleshooting and routine maintenance
145
C
Replacing the consumable itemsC
You will need to replace the consumable items when the machine indicates that the life of the 
consumable is over.
IMPORTANT
• We recommend placing used consumable items on a sheet of paper to prevent accidentally 
spilling or scattering the material inside.
• Be sure to reseal the consumable items tightly so that the material inside does not spill.
 
Note
• Discard used consumable items according to local regulations. (See EU...

146
Replacing a toner cartridgeC
The High Yield toner cartridges can print 
approximately 8,000 pages
1 and the 
Standard toner cartridges can print 
approximately 3,000 pages
1. Actual page 
count will vary depending on your average 
type of document (i.e., standard letter, 
detailed graphics). When a toner cartridge is 
running low, the LCD shows Toner Low.
1Approx. cartridge yield is declared in accordance 
with ISO/IEC 19752.
Note
It is a good idea to keep a new toner 
cartridge ready for use when...

Troubleshooting and routine maintenance
147
C
cPush down the blue lock lever and take 
the used toner cartridge out of the drum 
unit.
 
WARNING 
DO NOT put a toner cartridge into a fire. It 
could explode, resulting in injuries.
 
IMPORTANT
• 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...

148
dUnpack the new toner cartridge. Gently 
shake from side to side several times to 
distribute the toner evenly inside the 
cartridge.
 
ePull off the protective cover. 
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.
 
Note
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 blue...

Troubleshooting and routine maintenance
149
C
Replacing the drum unitC
The machine uses a drum unit to create print 
images on paper. If the LCD shows 
Replace Parts Drum, the drum unit is 
near the end of its life and it is time to buy a 
new one. Even if the LCD shows 
Replace Parts Drum, you may be able to 
continue printing without having to replace 
the drum unit for a while. However, if there is 
a noticeable deterioration in the output print 
quality (even before Replace Parts Drum 
appears), then...