Brother DCP 8020 User Manual

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 6
1Pull the paper tray completely out of the DCP.
2Pull the jammed paper up and out of the DCP.
3Press the cover release button and then open the front cover.
4Pull out the drum unit assembly. Pull the jammed paper up and 
out of the DCP. If you cannot remove the drum unit assembly 
easily at this time, do not use extra force. Instead, pull the edge 
of the jammed paper from the paper tray.
 
						

							14 - 7   TROUBLESHOOTING AND ROUTINE MAINTENANCE
WARNING
To prevent damage to the DCP caused by static electricity, do not 
touch the electrodes shown in the following diagram.
5Open the back output tray. Pull the jammed paper out of the 
fuser unit. If the paper jam can be cleared, go to Step 7. 
If you have to pull the paper toward the back of the DCP, the 
fuser may get dirty with toner powder and it may scatter on the 
next printouts. Print a few copies of the test page until the 
scattering of toner stops.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 8
WARNING
After you have just used the DCP, some internal parts of the DCP are 
extremely HOT! Wait for the DCP to cool down before you touch the 
internal parts of the DCP.
6Open the jam clear cover. Pull the jammed paper out of the fuser 
unit.
7Close the jam clear cover. Close the back output tray.
HOT!
Back view
 
						

							14 - 9   TROUBLESHOOTING AND ROUTINE MAINTENANCE
8Push the lock lever down and take the toner cartridge out of the 
drum unit. Take out the jammed paper if there is any inside the 
drum unit. Then put the toner cartridge back in the drum unit.
9Put the drum unit assembly back in the DCP.
10Put the paper tray in the DCP.
11Close the front cover.
Paper is jammed in the duplex tray (For DCP-8025D)
1Pull the duplex tray and paper tray out of the DCP.
2Pull the jammed paper out of the DCP.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 10
3Put the duplex tray and paper tray back into the DCP.
■The Jam Duplex message appears if you remove a sheet 
of paper from the Face Down Output Tray after only one side 
has printed.
■If the Paper Adjustment Lever for Duplex Printing is not set 
correctly for the paper size, paper jams may occur and the 
printing will be out of position on the page. (See To use 
Automatic Duplexing for copy and print operations (For 
DCP-8025D) on page 2-11.)
 
						

							14 - 11   TROUBLESHOOTING AND ROUTINE MAINTENANCE
If you are having difficulty with your DCP
If the copy looks good, the problem is probably not your DCP. Check 
the chart below and follow the troubleshooting tips.
DIFFICULTYSUGGESTIONS
Printing
Condensed print and 
horizontal streaks or the top 
and bottom of sentences are 
cut off.
If the copy looks bad, clean the scanner area. If there is still problem, call 
Brother Customer Ser vi ce at 1-800-284-4329 (in USA), 1- 877-BROTHER 
(in Canada) or (514) 685-6464 (in Montreal)  or your dealer  for ser vice.
Poor quality print. See Improving the print quality on page 14-14.
Vertical black lines. Your DCP’s primary corona wire for printing may be dirty. Clean your 
primary corona wire (see Cleaning the drum unit on page 14-23). If the 
problem continues, call Brother Customer Service at 
1-800-284-4329 (In USA), 1-877-BROTHER (In Canada) or 
(514) 685-6464 (In Montreal).
Copy Quality Difficulties
Vertical streaks appear in 
copies.Sometimes you may see vertical streaks on your copies. Either the 
scanner or the primary corona wire for printing is dirty. Clean them both. 
(Se e Cleaning the scanner on page 14-21 and Cleaning the drum unit 
on page 14-23.)
Printer Difficulties
The DCP does not print. Check the following:
 The DCP is plugged in and the power switch is turned On. (See Quick 
Setup Guide on page 5.) 
 The toner cartridge and drum unit are installed properly. (See 
Replacing the drum unit on page 14-30.)
 The interface cable is securely connected between the DCP and 
computer. (See Quick Setup Guide.) 
 Check to see if LCD is showing an error message. (See Error 
messages on page 14-1.)
The DCP prints unexpectedly 
or it prints garbage.Reset the DCP or turn it off and then on again. Check the primary 
settings in your application software to make sure it is set up to work with 
your DCP.
The DCP prints first couple of 
pages correctly, then some 
pages have text missing.Your computer is not recognizing the printer’s input buffer full signal. 
Please make sure to connect the DCP cable correctly.
The DCP cannot print full 
pages of a document.
Out of Memory message 
occurs.Reduce the printing resolution. Reduce the complexity of your 
document and try again. Reduce the graphic quality or the number of 
font sizes within your application software. 
My headers or footers appear 
when I view my document on 
the screen but do not appear 
when I print them.Most laser printers have a restricted area that will not accept print. 
Usually these are the first two lines and last two lines, leaves 62 
printable lines. Adjust the top and bottom margins in your document to 
allow for this.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 12
Scanning Difficulties
TWAIN errors appear while 
scanning.Make sure the Brother TWAIN driver is selected as the primary source. 
In PaperPort
®, click Scan in the File menu and select the Brother 
TWAIN driver.
Software Difficulties
Cannot perform ‘2 in 1 or 4 in 1’ 
printing.Check that the paper size setting in the application and in the printer 
driver are the same.
Cannot print when using 
Adobe Illustrator.Try to reduce the print resolution.
When using ATM fonts, some 
characters are missing or 
some characters are printed in 
their place.If you are using Windows
® 95/98/98SE/Me, select ‘Printer Settings’ from 
the ‘Start’ menu. Select the properties of the ‘Brother DCP-8020 or 
DCP-8025D (USB) Printer’. Click ‘Spool Setting’ on the ‘Details’ tab. 
Select ‘RAW’ from ‘Spool Data Format.’
“Unable to write to LPT1” or 
“LPT1 already in use” Error 
Message appears.1. Make sure the DCP is on (plugged into the AC power outlet) and 
turned the power switch on. and that it is connected directly to the 
computer using the bundled IEEE-1284 bi-directional parallel cable. 
The cable must not go through another peripheral device (such as a 
Zip Drive, External CD-ROM Drive, or Switch box).
2. Make sure the DCP is not displaying an error message on the LCD 
Display.
3. Make sure no other device drivers, which also communicate through 
the parallel port, are running automatically when you boot up the 
computer (such as, drivers for Zip Drives, External CD-ROM Drive, 
etc.) Suggested areas to check: (Load=, Run=command lines in the 
win.ini file or the Statup Group)
4. Check with you computer manufacturer to confirm that the computer’s 
parallel port settings in the BIOS are set to support a bi-directional 
machine; i.e. (Parallel Port Mode – ECP) “MFC is Busy” or “MFC 
Connect Failure” Error 
Message appears.
“MFC  Connect  Failure” If the DCP is not connected to your PC and you have loaded the Brother 
software, the PC will show ‘MFC Connect Failure’ each time you restart 
Windows
®. You can ignore this message or you can turn it off as follows.
Double-click “	ool\RmRunOff.REG” from the supplied CD-ROM.
The Scan key on the DCP’s control panel will not work unless you restart 
your PC with the DCP connected. To turn it back on, Double-click 
“	ool\RmRunOn.REG” from the supplied CD-ROM.
Paper Handling Difficulties
The DCP does not load paper. 
The LCD shows Check 
Paper or Paper Jam.Check to see if the Check Paper or Paper Jam message appears on 
the LCD. If it is empty, load a new stack of paper into the paper tray. If 
there is paper in the paper tray, make sure it is straight. If the paper is 
curled, you should straighten it. Sometimes it is helpful to remove the 
paper, turn the stack over and put it back into the paper tray. Reduce the 
amount of paper in the paper tray, and then try again. Check that the 
manual feed mode or MP tray or MP mode is not selected in the printer 
driver.
The DCP does not feed paper 
from the manual feed tray.Reinsert the paper firmly, load one sheet at a time. Make sure that 
manual feed mode or MP mode is selected in the printer driver.
How can I load envelopes? You can load envelopes from the manual feed or MP tray. Your 
application software must be set up to print the envelope size you are 
using. This is usually done in the Page Setup or Document Setup menu 
of your software. Refer to your software application manual. 
What paper can I use? You can use plain paper, envelopes, transparencies and labels that are 
made for laser machines. (For information on paper you can use, see 
Printer operation keys on page 6-16.)
How can I clear paper jams? See Paper jams
 on page 14-5.
DIFFICULTYSUGGESTIONS
 
						

							14 - 13   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Print Quality Difficulties
Printed pages are curled. Thin or thick paper below the standard can cause this problem. Make 
sure you select the Paper Type that suits the media type you use. (See 
Setting the Paper Type on page 4-1 and Media Type on page 7-4.)
Printed  pages are smeared. The Paper Type setting may be incorrect for the type of print media you 
are using—OR—The print media may be too thick or have a rough 
surface. (See Setting the Paper Type on page 4-1 and Media Type on 
page 7-4.)
Printouts  are  too  light. Set Toner Save mode to off in the Advance tab in the printer driver. (See 
Toner Save Mode on page 7-6.)
Network Difficulties
I cannot print over the Network Make sure that your DCP is powered on and is On Line and in Ready 
mode. Press the Test switch. Then the current settings of the NC-9100h 
are printed.Verify that the cabling and Network connections are good. If 
possible, try connecting the DCP to a different port on your hub using a 
different cable. Check to see if there is any LED activity. The NC-9100h 
has a two color LED for diagnosing problems.
DIFFICULTYSUGGESTIONS
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   14 - 14
Improving the print quality
This section provides information on the following topics:
Examples of poor print 
qual ityRecommendation
FaintCheck the printer’s environment. Conditions such as humidity, high 
temperatures, and so on may cause this print fault. (See Choosing a 
location on page x.)
If the whole page is too light, Toner Save mode may be on. Turn off 
Toner Save mode in the printer Properties tab of the driver.
—OR—
If your DCP is not connected to a computer, turn off Toner Save mode 
in the DCP itself. (See Toner Save
 on page 4-4.)
Try installing a new toner cartridge. (See Replacing the toner cartridge
 
on page 14-24.)
Try installing a new drum unit. (See Replacing the drum unit
 on page 
14-30.)
Gray backgroundMake sure that you use paper that meets the recommended 
specifications. (See About paper on page 2-1.)
Check the printer’s environment - high temperatures and high humidity 
can increase the amount of background shading. (See Choosing a 
location on page x.)
Use a new toner cartridge. (See Replacing the toner cartridge on page 
14-24.)
Use a new drum unit. (See Replacing the drum unit on page 14-30.)
GhostMake sure you use paper that meets our specifications. Rough-surfaced 
paper or thick print media may cause this problem.
Make sure that you choose the appropriate media type in the printer 
driver. (See About paper
 on page 2-1.)
Try using a new drum unit. (See Replacing the drum unit on page 
14-30.)
Toner specksMake sure that you use paper that meets our specifications. 
Rough-surfaced paper may cause the problem. (See About paper on 
page 2-1.)
The drum unit may be damaged. Put in a new drum unit. (See Replacing 
the drum unit
 on page 14-30.)
Hollow printMake sure that you use paper that meets our specifications. (See About 
paper on page 2-1.)
Choose Thick paper mode in the printer driver, or use thinner paper 
than you are currently using.
Check the printer’s environment because conditions such as high 
humidity can cause hollow print. (See Choosing a location on page x.)
All blackYou may clear the problem by cleaning the primary corona wire inside 
the drum unit by sliding the blue tab. Make sure you return the blue tab 
to the home position (
▲). (Se e Cleaning the drum unit on page 14-23.)
The drum unit may be damaged. Put in a new drum unit. (See Replacing 
the drum unit on page 14-30.)
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
CDEF
defgBC
bcd23
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
 
						

							14 - 15   TROUBLESHOOTING AND ROUTINE MAINTENANCE
White Spots on black text 
and graphics at 3.7 in. 
(94 mm) intervals
Black Spots at 3.7 in. 
(94 mm) intervalsIf the problem is not solved after printing a few pages, the drum unit may 
have glue from label stock on the OPC drum surface.
Clean the drum unit as follows:
1 Position the print sample in front of the drum unit, and find the exact 
position of the poor print.
2 Turn the drum unit gear by hand while looking at the surface of the 
OPC drum.
Caution
Do not touch the photosensitive drum with your fingers.
3 When you have located the mark on the drum that matches the print 
sample, wipe the surface of the OPC drum with a cotton swab until 
the dust or paper powder on the surface comes off.
Caution
Do not try to clean the surface of the photosensitive drum with a sharp 
object, such as a ball-point pen, and so on.
The drum unit may be damaged. Put in a new drum unit. (See Replacing 
the drum unit on page 14-30.)
Examples of poor print 
qualityRecommendation
3.7 in.
(94 mm)
3.7 in.
(94 mm)
3.7 in.
(94 mm)
3.7 in.
(94 mm)
Photosensitive drum