Brother DCP 8020 User Manual

TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 16
Black toner marks across 
the pageThe drum unit may be damaged. Put in a new drum unit. (See Replacing 
the drum unit on page 14-30.)
Make sure that you use paper that meets our specifications. (See About 
paper on page 2-1.)
If you use label sheets for laser printers, the glue from the sheets may 
sometimes stick to the OPC drum surface. Clean the drum unit. (See 
Cleaning the drum unit on page 14-23.)
Do not use paper that has clips or staples because...

14 - 17   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Curl or waveCheck the paper type and quality. High temperatures and high humidity 
will cause paper to curl.
If you don’t use the printer very often, the paper may have been in the 
paper tray too long. Turn over the stack of paper in the paper tray. Also, 
try fanning the paper stack and then rotating the paper 180° in the paper 
tray.
Try printing using the straight-through output path. (See How to load 
paper on page 2-5.)
Wrinkles or creasesMake sure...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 18
Packing and shipping the DCP
Whenever you transport the DCP, use the packing materials that 
came with your machine. If you do not pack the DCP correctly, you 
may void your warranty.
1Turn the DCP power switch off.
2Unplug the DCP from the AC outlet.
Lock the Scanner Lock
3Push the Scanner Lock Lever up to lock the scanner. This lever 
is located on the left of the scanner glass.
Caution
Damage caused to your DCP by failure to lock the scanner before...

14 - 19   TROUBLESHOOTING AND ROUTINE MAINTENANCE
5Remove the drum unit and toner cartridge assembly. Leave the 
toner cartridge installed in the drum unit.
6Place the drum unit and toner 
cartridge assembly into the plastic bag 
and seal the bag.
7Close the front cover. Fold down the face-down output tray flap.
8Wrap the DCP in the plastic bag 
and place it in the original carton 
with the original packing 
material.
 

TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 20
9Pack the drum unit and toner cartridge assembly, AC cord and 
printed materials in the original carton as shown below: 
10Close the carton and tape it shut.
If you are returning the DCP to Brother as part of the Exchange 
Service, pack only
 the DCP. Keep all separate parts to use with 
your ‘Exchange’ machine.
 

14 - 21   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Routine maintenance
Cleaning the scanner
Turn the DCP power switch off and lift the document cover. Clean the 
scanner glass and glass strip with dry cloth and the white film with 
isopropyl alcohol on a lint free cloth.
If the screen still
 displays a scanner error, call Brother Customer 
Service for assistance at 1-800-284-4329 (in USA), 
1-877-BROTHER (in Canada), 
or (514) 685-6464 (in Montreal).
White Film
Document Cover
Glass strip
White film
 

TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 22
Cleaning the printer
Caution
■Do not use isopropyl alcohol to remove dirt from the control 
panel. It may crack the panel.
■Do not
 use isopropyl alcohol to clean the laser scanner window 
or toner sensor.
■Do not
 touch the scanner window with your finger.
■The drum unit contains toner, so handle it carefully. If toner 
scatters and your hands or clothes get dirty, immediately wipe or 
wash it off with cold water.
1Turn the DCP power switch off and open...

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Cleaning the drum unit
We recommend placing the drum unit and toner cartridge assembly 
on a cloth or large disposable paper to avoid spilling and scattering 
toner.
1Clean the primary corona wire inside the drum unit by gently 
sliding the blue tab from right to left several times.
2Return the blue tab and snap it into the Home position (▼). 
Caution
If the blue tab is not at Home position (▼), printed pages may have 
vertical stripes.
3Reinstall the...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 24
Replacing the toner cartridge
The DCP can print up to 6,500 pages using a high yield toner 
cartridge. When the toner cartridge is running low, the LCD shows 
Toner Low. The DCP is supplied with a standard toner cartridge 
that must be replaced after approximately 3,300 pages. Actual page 
count will vary depending on your average type of original (i.e., 
standard letter, detailed graphics).
Discard the used toner cartridge according to local regulations,...

14 - 25   TROUBLESHOOTING AND ROUTINE MAINTENANCE
How to replace the toner cartridge
WARNING
Just after you use the DCP, some internal parts of the machine will 
be extremely HOT! So, never touch the shaded parts shown in the 
illustration.
1Open the front cover and pull out the drum unit.
HOT!