Brother DCP 9040CN User Manual

							Troubleshooting and routine maintenance
59
C
Uneven density appears 
periodically across the page
 
„Identify the color that is uneven and put in a new toner cartridge for 
that color. (See Replacing a toner cartridge on page 101.)
„The drum unit may be damaged. Put in a new drum unit. (See 
Replacing the drum unit on page 106.)
„Make sure that the fuser unit is installed properly.
Missing image at edge„Make sure that the toner cartridges are installed properly. (See 
Replacing a toner cartridge on page 101.)
„Make sure that the drum unit is installed properly. (See Replacing the 
drum unit on page 106.)
„One of the toner cartridges may be damaged. Identify the missing 
color and put in a new toner cartridge for the color with the white line. 
(See Replacing a toner cartridge on page 101.)
„The drum unit may be damaged. Put in a new drum unit. (See 
Replacing the drum unit on page 106.)
Missing image at thin line
„If you are using a Windows
® printer driver, open Properties window, 
and then click Printing Preferences. Choose the Advanced tab, 
Device Options, Print Setting, and then check the Improve pattern 
printing or Improve Thin Line boxes.
Wrinkle
 
„Change to the recommended type of paper. (See Recommended 
paper on page 12.) 
„Check the paper type and quality. (See Acceptable paper and other 
media on page 12.)
„Make sure that the back cover is closed properly.
„Make sure that paper is loaded properly.
„Make sure that you choose the proper media type in the printer driver 
or in the machine
’s Paper Type menu setting. (See Acceptable paper 
and other media on page 12 and Basic tab in the Software User’s 
Guide on the CD-ROM.)
„Turn over the stack of paper in the tray or rotate the paper 180° in the 
input tray.
„Make sure that the drum unit is installed properly. (See Replacing the 
drum unit on page 106.)
„Make sure that the fuser unit is installed properly.
„Replace the fuser unit. Call Brother Customer Service.
Insufficient gloss„Change to the recommended type of paper. (See Recommended 
paper on page 12.) 
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
 
						

							60
Offset image
 
„Check the machine’s environment. Conditions such as high 
temperatures and high humidity can cause this problem. (See 
Choosing a location on page 36.)
„Make sure that you use paper that meets our specifications. (See 
Acceptable paper and other media on page 12.) 
„Make sure that you choose the proper media type in the printer driver 
or in the machine
’s Paper Type menu setting. (See Acceptable paper 
and other media on page 12 and Basic tab in the Software User’s 
Guide on the CD-ROM.)
„Change to the recommended type of paper. (See Recommended 
paper on page 12.) 
„The drum unit may be damaged. Put in a new drum unit. (See 
Replacing the drum unit on page 106.)
Poor fixing
 
„Make sure that you use paper that meets our specifications. (See 
Acceptable paper and other media on page 12.) 
„Make sure that you choose the proper media type in the printer driver 
or in the machine
’s Paper Type menu setting. (See Acceptable paper 
and other media on page 12 and Basic tab in the Software User’s 
Guide on the CD-ROM.)
„Make sure that the release lever of the fuser unit is in the closed 
position.
„Call Brother Customer Service to replace the fuser unit.
Poor fixing when printed on 
thick paper„Choose Thick paper mode in the printer driver or in the machine
’s 
Paper Type menu setting. (See Paper type on page 21 and Basic tab 
in the Software User’s Guide on the CD-ROM.)
„Make sure that you use paper that meets our specifications. (See 
Acceptable paper and other media on page 12.) 
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
 
						

							Troubleshooting and routine maintenance
61
C
Curled or waved
 
„Make sure that you choose the proper media type in the printer driver 
or in the machine
’s Paper Type menu setting. (See Acceptable paper 
and other media on page 12 and Basic tab in the Software User’s 
Guide on the CD-ROM.)
„Check the paper type and quality. High temperatures and high 
humidity will cause paper to curl.
„If you do not use the machine often, the paper may have been in the 
paper tray too long. Turn over the stack of paper in the paper tray. 
Also, fan the paper stack and then rotate the paper 180° in the paper 
tray.
„Follow these steps:
aOpen the back cover.
bPush the gray lever to the right as shown below. 
cClose the back cover and resend the print job.
Note
When you have finished printing, open the back cover and reset the 
lever back to the original position.
 
Examples of poor print 
qualityRecommendation
 
						

							62
Envelope creases
 aOpen the back cover.
bPull down the two gray levers, one on the left-hand side and one on 
the right-hand side to the envelope position, as shown in the 
illustration below.
 
cClose the back cover and re-send the print job.
Note
When you have finished printing, open the back cover and reset the 
two gray levers back to their original position.
 
Examples of poor print 
qualityRecommendation
ABCDEFG
EFGHIJKLMN
 
						

							Troubleshooting and routine maintenance
63
C
White lines or ribbing down the 
page on duplex print
 
Note
Position B is only for duplex 
printing with recycled paper 
when the temperature and 
humidity are low.
 
„Choose Thin Paper mode in the printer driver and re-send the print 
job.
If the problem is not solved after printing a few pages, follow these 
steps:
aOpen the back cover.
bPull down the two grey levers, one on the left-hand side and one 
on the right-hand side, to position B as shown in the illustration 
below.
 
cClose the back cover.
dChoose Plain Paper mode in the printer driver and re-send the 
print job.
eIf the problem is not solved after printing a few pages, choose 
Thin Paper mode in the printer driver and re-send the print job.
Note
When you have finished printing, open the back cover and reset the 
two grey levers back to the original position.
 
„Use thicker paper than you are now using.
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
 
						

							64
Toner scatter or toner stain on 
the edge of duplex pages
 
CAUTION 
We recommend that you place the drum unit and toner cartridges on a 
clean, flat surface with a piece of disposable paper underneath them in 
case you accidentally spill or scatter toner.
  DO NOT touch the surface of the photosensitive drum.
 
Take all the toner cartridges out of the drum unit and turn the drum 
unit over. Wipe the toner on the edge of drum unit with a dry lint free 
soft cloth as shown in the illustration.
 
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
 
						

							Troubleshooting and routine maintenance
65
C
Error and maintenance messagesC
As with any sophisticated office product, errors may occur and consumable items may need to be 
replaced. If this happens, your machine identifies the error or required routine maintenance and 
show the appropriate message. The most common error and maintenance message are shown 
below.
Error MessageCauseAction
CalibrateCalibration failed. Press Black Start or Color Start and try it 
again.
Do one of the following:
„Turn off the machine’s power switch. Wait 
a few seconds, then turn it on again.
„Put in a new drum unit. (See Replacing the 
drum unit on page 106.)
„Put in a new belt unit. (See Replacing the 
belt unit on page 113.)
„Put in a new waste toner box. (See 
Replacing the waste toner box 
on page 117.)
„If the problem continues, call Brother 
Customer Service.
Cartridge Error
Put the Black (K) 
Toner Cartridge 
back in.
1
1The toner cartridge 
color with the 
problem is shown in 
the message.
The toner cartridge is not installed 
properly.Pull out the drum unit, take out the toner 
cartridge that is indicated on the LCD, and put 
it back into the drum unit again.
Change Belt UnitIt is time to replace the belt unit. Replace the belt unit. (See Replacing the belt 
unit on page 112.)
Change PF Kit MPIt is time to replace the paper 
feeding kit for the MP tray.Call Brother Customer Service at 
1-877-BROTHER (1-877-276-8437) (in USA) 
or 1-877-BROTHER (in Canada).
Change PF Kit 1It is time to replace the paper 
feeding kit for Tray 1.Call Brother Customer Service at 
1-877-BROTHER (1-877-276-8437) (in USA) 
or 1-877-BROTHER (in Canada).
 
						

							66
Cooling Down
Wait for a whileThe temperature of the drum unit 
or toner cartridge is too hot. The 
machine will pause its current 
print job and go into cooling down 
mode. During the cooling down 
mode, you will hear the cooling 
fan running while the LCD shows 
Cooling Down, and 
Wait for a while.Make sure that you can hear the fan in the 
machine spinning and that the exhaust outlet 
isnt blocked by something.
If the fan is spinning, remove any obstacles 
that surround the exhaust outlet, and then 
leave the machine turned on but do not use it 
for several minutes.
If the fan is not spinning follow the suggestions 
below.
Turn off the machines power switch and then 
turn it on again. If the error message continues 
leave the machine for several minutes and 
then try it again.
Cover is OpenThe front cover is not closed 
completely.Close the front cover of the machine.
Cover is OpenThe back cover is not closed 
completely.Close the back cover of the machine.
Document JamThe document was not inserted 
or fed properly, or the document 
scanned from the ADF was too 
long.See Document jams on page 69 or Using the 
ADF (automatic document feeder) 
on page 18.
Drum End SoonThe drum unit is near the end of 
its life.Use the drum unit until you have a print quality 
problem; then replace the drum unit with a new 
one.
(See Replacing the drum unit on page 106.)
The drum unit counter was not 
reset when a new drum was 
installed.Press Menu, 5, 5, and then 
a or b to choose 
Drum. Press OK and press 1 to reset the drum 
unit counter.
Drum ErrorThe corona wires on the drum 
unit need to be cleaned.Clean the four corona wires on the drum unit. 
(See Cleaning the corona wires on page 87.)
EL ErrorThe machine has a mechanical 
problem.Open the front cover and close it again.
Fuser ErrorThe temperature of fuser unit 
does not rise at a specified 
temperature within specified time.Turn the power switch off, wait a few seconds, 
and then turn it on again. Leave the machine 
for 15 minutes with the power on.
The fuser unit is too hot.
Fuser Unit EndIt is time to replace the fuser unit. Call Brother Customer Service to replace the 
fuser unit.
Init Unable XXThe machine has a mechanical 
problem.Turn off the machine’s power switch and then 
turn it on again. If the error message continues 
leave the machine for several minutes and 
then try to print, copy or scan again.
Jam Duplex
(DCP-9042CDN only)The paper is jammed in the 
duplex tray.(See Paper is jammed underneath Paper Tray 
1 or in the fuser unit (DCP-9042CDN only) 
on page 78.)
Error MessageCauseAction
 
						

							Troubleshooting and routine maintenance
67
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Jam RearThe paper is jammed in the back 
of the machine.(See Paper jams on page 70.)
Jam InsideThe paper is jammed inside the 
machine.(See Paper jams on page 70.)
JamMPTrayThe paper is jammed in the MP 
tray of the machine.(See Paper jams on page 70.)
JamTray1The paper is jammed in the paper 
tray of the machine.(See Paper jams on page 70.)
Laser Unit EndIt is time to replace the laser unit. Call Brother Customer Service to replace the 
laser unit.
Low TemperatureThe temperature of the machine 
is too cold.Increase room temperature to allow the 
machine to operate.
No Belt UnitThe belt unit is not installed. Install the belt unit. (See Replacing the belt 
unit on page 112.)
No Drum UnitThe  drum unit is  not installed. Install the drum unit. (See Replacing the drum 
unit on page 106.)
No PaperThe machine is out of paper or 
paper is not properly loaded in the 
paper tray.Do one of the following:
„Refill the paper in the paper tray or MP 
tray.
„Remove the paper and load it again.
No TrayThe paper tray is not completely 
closed.Close the paper tray properly.
No Waste TonerThe waste toner box is not 
installed.Install the waste toner box. (See Replacing the 
waste toner box on page 117.)
Out of MemoryThe machine’s memory is full.Copy operation in progress
Do one of the following:
„Press Black Start or Color Start to copy 
the scanned pages.
„Press Stop/Exit and wait until the other 
operations in progress finish, and then try 
again.
„Clear the data from the memory. (See Out 
of memory message on page 32.)
Print operation in process
Reduce print resolution. (See Advanced tab in 
the Software User’s Guide on the CD-ROM.)
Print Unable XXThe machine has a mechanical 
problem.Turn off the machine’s power switch and then 
turn it on again. If the error message continues 
leave the machine for several minutes and 
then try to print, copy or scan again.
Error MessageCauseAction
 
						

							68
RegistrationRegistration failed. Press Black Start or Color Start and try 
again.
Do one of the following:
„Try Manual Registration, Menu, 3, 7. (See 
Manual Registration on the Software 
User’s Guide on the CD-ROM.)
„Put in a new belt unit. (See Replacing the 
belt unit on page 112.)
„Put in a new drum unit. (See Replacing the 
drum unit on page 106.)
„Replace the empty toner cartridge with a 
new one. (See Replacing a toner cartridge 
on page 101.)
„Turn off the machine’s power switch. Wait 
a few seconds, then turn it on again.
„If the problem continues, call Brother 
Customer Service.
Scan Unable XXThe machine has a mechanical 
problem.Turn off the machines power switch and then 
turn it on again. If the error message continues 
leave the machine for several minutes before 
you try it again.
Toner Life End
Replace Black(K)
Toner Cartridge.1
1The toner cartridge 
color which is used 
up is shown in the 
message.
The drum unit and toner 
cartridges assembly is not 
installed properly, or one or more 
of the toner cartridges have 
reached the end of their life and 
printing is not possible.Do one of the following:
„Re-install the toner cartridges and drum 
unit assembly.
„Replace the toner cartridge with a new 
one. (See Replacing a toner cartridge 
on page 101.)
„If one of the color toner cartridges has 
reached the end of its life, choose Mono in 
the printer driver to be able to continue 
printing in monochrome.
Toner Low
Prepare New Black(K)
Toner Cartridge.1
1The toner cartridge 
color which is near 
the end of life is 
shown in the 
message.
If the LCD shows Toner Low, 
you can still print; however, the 
machine is telling you that the 
toner cartridge is near the end of 
its life.Order a new toner cartridge now for the toner 
cartridge color that is low.
Waste Toner FullIt is time to replace the waste 
toner box.Replace the waste toner box. (See Replacing 
the waste toner box on page 117.)
Waste Toner SoonThe waste toner box is almost full. Be ready to replace the waste toner box. (See 
Replacing the waste toner box on page 117.)
Wrong Paper SizeThe paper in the tray is not the 
correct size or the tray is empty.Load the correct size of paper in the tray.
Error MessageCauseAction