Brother DCP 9040CN User Manual

49
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TroubleshootingC
IMPORTANT
For technical help, you must call the country where you bought the machine. Calls must be 
made from within that country.
 
If you are having difficulty with your machineC
If you think there is a problem, check the chart below and follow the troubleshooting tips. You can 
solve most problems by yourself.
If you need additional help, the Brother Solutions Center offers the latest FAQs and 
troubleshooting tips.
Visit us at http://solutions.brother.com/
.
Troubleshooting...

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The machine prints unexpectedly 
or it prints garbage.„
Pull out the paper tray and wait until the machine stops printing. Then turn off 
the machine’s power switch and disconnect from the power for several 
minutes.
„ Check the settings in your application to make sure it is set up to work with 
your machine.
The machine prints the first couple 
of pages correctly, then some 
pages have text missing. „
Check the settings in your application to make sure that it is set up to work with 
your machine....

Troubleshooting and routine maintenance
51
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Paper handling difficulties
DifficultiesSuggestions
The machine does not load paper.
The LCD shows No Paper or a 
Paper Jam message. „If there is no paper, 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...

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The network scanning feature 
does not work.
The network printing feature does 
not work.(For Windows® only) The firewall setting on your PC may be rejecting the 
necessary network connection. Follow the instructions below to configure your 
firewall. If you are using a personal firewall software, see the User’s Guide for your 
software or contact the software manufacturer.
For Windows
® XP SP2 users:
aClick the Start button, Control Panel, Network and Internet Connections, 
and then Windows Firewall....

Troubleshooting and routine maintenance
53
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The network scanning feature 
does not work.
The network printing feature does 
not work.
(continued)For Windows Vista® users:
aClick the Start button, Control Panel, Network and Internet, Windows 
Firewall and click Change settings.
bWhen the User Account Control screen appears, do the following.
„Users who have administrator rights: Click Continue.
„For users who do not have administrator rights: Enter the administrator 
password and click OK.
cMake sure...

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Improving the print qualityC
If you have a print quality problem, print a test page first (Menu, 3, 2, 3). If the printout looks good, 
the problem is probably not the machine. Check the interface cable or try the machine on another 
computer.
Note
You can resolve a print quality problem by replacing a toner cartridge with a new one when the 
LCD shows the Toner Life End message.
 
Examples of poor print 
qualityRecommendation
White lines or bands or ribbing 
across the page
 
„Make sure that the...

Troubleshooting and routine maintenance
55
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Colored streaks or bands down 
the page
 
„One of the toner cartridges may be damaged. Replace the toner 
cartridge that matches the color of the streak or band. (See Replacing 
a toner cartridge on page 101.)
„Clean all four corona wires (one for each color) of the drum unit by 
sliding the green tab. (See Cleaning the corona wires on page 87.)
„Make sure each corona wire’s green tab is at the home position (b).
„The drum unit may be damaged. Put in a new...

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Colored or white spots at 
2.95 in. intervals (75 mm)
 aDust, paper powder, glue, and so on may stick to the surface of the 
photosensitive drum (OPC) and cause colored or white spots to 
appear on printed documents.
bMake five copies of a blank, white sheet of paper. (See Making 
multiple copies on page 26.)
cIf you still see the spots down the printed documents at 
2.95 in. (75 mm) intervals after you made five copies, clean the 
drum unit. (See Cleaning the drum unit on page 90.)
dIf the print...

Troubleshooting and routine maintenance
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Ghost
 
„Make sure that you use paper that meets our specifications. Rough-
surfaced paper or thick paper may cause the problem. (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.)
„The drum unit may be damaged. Put in a new drum unit....

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Color misregistration
 
„Make sure that the drum unit is installed properly. (See Replacing the 
drum unit on page 106.)
„Make sure that the belt unit is installed properly. (See Replacing the 
belt unit on page 112.)
„Make sure that the waste toner box is installed properly. (See 
Replacing the waste toner box on page 117.)
„Perform the auto color registration by using the control panel. Press 
Menu, 3, 6, 1.
Or
„Perform the manual color registration by using the control panel.
aPrint the correction...