Brother MFC 9120CN User Manual

							
Troubleshooting and routine maintenance129
C
Menu access difficulties
DifficultiesSuggestions
The machine beeps when you try to 
access the Setup Receive and 
Setup Send menus. If 
Fax  is not illuminated, press it to turn on Fax mode. The Setup Receive 
setting ( Menu, 2 , 1 ) and Setup Send setting ( Menu, 2 , 2 ) are available only when 
the machine is in Fax mode.
Copy difficulties
DifficultiesSuggestions
Cannot make a copy. „Make sure that  Copy is illuminated. (See  Entering copy mode 
on page 86.)
„ (For MFC-9320CW only) Contact your administrator to check your Secure 
Function Lock Settings.
Vertical black line appears in 
copies. Black vertical lines on copies are typically caused by dirt or correction fluid on the 
glass strip, or one or more corona wires are dirty. (See 
Cleaning the scanner glass 
on page 156 and  Cleaning the corona wires  on page 158.)
Copies are blank. Make sure you are loading the document correctly. (See  Using the automatic 
document feeder (ADF)  on page 22 or Using the scanner glass (Flatbed)  
on page 23.)
Printing difficulties
DifficultiesSuggestions
No printout. „Check that the machine is plugged in and the power switch is turned on.
„ Check that the toner cartridge and drum unit are installed correctly. (See 
Replacing the drum units  on page 174.)
„ Check the interface cable connection on both the machine and your computer. 
(See the  Quick Setup Guide .)
„ Check that the correct printer driver has been installed and chosen.
„ Check to see if the LCD is showing an error message. (See  Error and 
maintenance messages  on page 142.)
„ Check the machine is online: (Windows Vista
®) Click the  Start button, 
Control Panel , Hardware and Sound , and then Printers. Right-click 
Brother MFC-XXXX Printer . Make sure that Use Printer Offline  is 
unchecked. (Windows
® XP and Windows Server® 2003) Click the  Start 
button and choose  Printers and Faxes . Right-click Brother MFC-XXXX 
Printer . Make sure that  Use Printer Offline  is unchecked. (Windows
® 2000) 
Click the  Start button and choose  Settings and then  Printers. Right-click 
Brother MFC-XXXX Printer . Make sure that Use Printer Offline  is 
unchecked.
„ (For MFC-9320CW only) Contact your administrator to check your Secure 
Function Lock settings.
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 and disconnect from the power for several minutes. (The 
machine can be turned off for up to 60 hours without losing faxes stored in the 
memory.)
„ Check the settings in your application to make sure it is set up to work with 
your machine.
 
						

							
130
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.
„ Your computer is not recognising the machine’s input buffer’s full signal. Make 
sure that you connected the interface cable correctly. (See the  Quick Setup 
Guide .)
The headers or footers appear 
when the document displays on the 
screen but they do not show up 
when it is printed. There is an unprintable area on the top and bottom of the page. Adjust the top and 
bottom margins in your document to allow for this. (See 
Unprintable area 
on page 16.)
The machine is not printing or has 
stopped printing. Press 
Job Cancel .
As the machine cancels the job and clears it from the memory it may produce an 
incomplete printout.
Scanning difficulties
DifficultiesSuggestions
TWAIN errors appear while 
scanning. Make sure that the Brother TWAIN driver is chosen as the primary source. In 
PaperPort™ 11SE, click 
File, Scan or Get Photo  and choose the Brother TWAIN 
driver.
OCR does not work. Try increasing the scanning resolution.
Network scanning does not work. See  Network difficulties on page 131.
Cannot scan. (For MFC-9320CW only) Contact your administrator to check your Secure  Function Lock Settings.
Software difficulties
DifficultiesSuggestions
Cannot install software or print. Run the  Repair MFL-Pro Suite program on the CD-ROM. This program will repair 
and reinstall the software.
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.
The machine does not print from 
Adobe
® Illustrator®. Try to reduce the print resolution. (See 
Advanced tab in the Software User’s Guide  
on the CD-ROM.)
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 tray, and then try again.
„ Make sure that manual feed mode is not chosen in the printer driver.
„ Clean the paper pick-up roller. See  Cleaning the paper pick-up rollers 
on page 164.
„ If the LCD shows the Paper Jam message and you still have a problem, see 
Paper jams  on page 150.
Printing difficulties (continued)
DifficultiesSuggestions
 
						

							
Troubleshooting and routine maintenance131
C
The machine does not feed paper 
from the manual feed slot.„
Make sure that  Manual is chosen in the printer driver.
„ Make sure the paper or print media is loaded correctly in the manual feed slot. 
See  Loading paper in the manual feed slot  on page 12.
How do I print on envelopes? You can load envelopes from the manual feed slot. Your application 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 application. (See your application’s manual for 
more information.)
What paper can I use? You can use thin paper, plain paper, thick paper, bond paper, recycled paper,  envelopes and labels that are made for laser machines. (For details, see 
Acceptable paper and other print media  on page 17.)
There is a paper jam. Clear the jammed paper. (See  Paper jams on page 150.)
Print quality difficulties
DifficultiesSuggestions
Printed pages are curled. „Low quality thin or thick paper or not printing on the recommended side of the 
paper could cause this problem. Try turning over the stack of paper in the 
paper tray.
„ Make sure that you choose the Paper Type that suits the print media type you 
are using. (See  Acceptable paper and other print media  on page 17.)
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  Acceptable 
paper and other print media  on page 17 and Basic tab in the Software User’s 
Guide  on the CD-ROM.)
Printouts are too light. „If this problem occurs when making copies or printing received faxes, set 
Toner Save mode to  Off in the machine menu settings. (See  Toner Save 
on page 26.)
„ Set Toner Save mode to  Off in the Advanced tab in the printer driver. (See 
Advanced tab  in the Software User’s Guide  on the CD-ROM.)
„ In the  Basic tab of the printer driver, click the  Settings button and check the 
Enhance Black Printing  check box.
Network difficulties
DifficultiesSuggestions
Cannot print over a wired Network. If you are having Network problems see the  Network User’s Guide on the 
CD-ROM for more information.
Make sure your machine is powered on and is on-line and in the Ready mode. 
Print the Network Configuration list to see your current Network settings. (See 
How to print a report  on page 84.) Reconnect the LAN cable to the hub to verify 
that the cable and network connections are good. If possible, try connecting the 
machine to a different port on your hub using a different cable. If the connections 
are good, the lower LED of the back panel of the machine will be green.
Paper handling difficulties (continued)
DifficultiesSuggestions
 
						

							
132
The network scanning feature 
does not work.
The network PC Fax Receive 
feature does not work.
The network printing feature does 
not work.(Windows®) The firewall setting on your PC may be rejecting the necessary 
network connection. Follow the instructions below to configure Windows
® 
Firewall. If you are using other personal firewall software, see the User’s Guide 
for your software or contact the software manufacturer.
 (Windows
® XP SP2)
aClick the  Start button,  Control Panel , Network and Internet 
Connections  and then Windows Firewall . Make sure that Windows 
Firewall  on the General  tab is set to On.
bClick the  Advanced  tab and Settings...
cClick the  Add button.
dTo add port 54925 for network scanning, enter the information below:
1. In  Description of service : Enter any description, for example 
“Brother Scanner”.
2. In  Name or IP address (for example 192.168.0.12) of the computer 
hosting this service on your network:  Enter “Localhost”.
3. In  External Port number for this service:  Enter “54925”.
4. In  Internal Port number for this service:  Enter “54925”.
5. Make sure  UDP is chosen.
6. Click  OK.
eClick the  Add button.
fTo add port 54926 for network PC Fax, enter the information below:
1. In  Description of service:  Enter any description, for example 
“Brother PC Fax”.
2. In  Name or IP address (for example 192.168.0.12) of the computer 
hosting this service on your network:  Enter “Localhost”.
3. In  External Port number for this service:  Enter “54926”.
4. In  Internal Port number for this service:  Enter “54926”.
5. Make sure  UDP is chosen.
6. Click  OK.
gIf you still have trouble with your network connection, click the  Add button.
hTo add port 137 for network scanning, network printing and network PC 
Fax receiving, enter the information below:
1. In  Description of service:  Enter any description, for example 
“Brother PC Fax receiving”.
2. In  Name or IP address (for example 192.168.0.12) of the computer 
hosting this service on your network:  Enter “Localhost”.
3. In  External Port number for this service:  Enter “137”.
4. In  Internal Port number for this service:  Enter “137”.
5. Make sure  UDP is chosen.
6. Click  OK.
iMake sure that the new setting is added and is checked, and then 
click OK.
Network difficulties (continued)
DifficultiesSuggestions
 
						

							
Troubleshooting and routine maintenance133
C
The network scanning feature 
does not work.
The network PC Fax Receive 
feature does not work.
The network printing feature does 
not work.
(continued)(Windows Vista®)
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 that  Windows Firewall  on the General  tab is set to On.
dClick the  Exceptions  tab.
eClick the Add port...  button.
fTo add port 54925 for network scanning, enter the information below:
1. In Name:  Enter any description. (for example “Brother Scanner”)
2. In  Port number:  Enter “54925”.
3. Make sure  UDP is chosen. Then click  OK.
gClick the  Add port...  button.
hTo add port 54926 for Network PC Fax, enter the information below:
1. In Name:  Enter any description. (for example “Brother PC Fax”)
2. In  Port number:  Enter “54926”.
3. Make sure  UDP is chosen. Then click  OK.
iMake sure that the new setting is added and is checked, and then click 
OK.
jIf you still have trouble with your network connection such as network 
scanning or printing, check  File and Printer Sharing box in the 
Exceptions  tab and then click  OK.
Your computer cannot find your 
machine. (Windows
®)
 The firewall setting on your PC may be rejecting the necessary 
network connection. (For details, see the instructions above.)
(Macintosh)  Re-select your machine in the Device Selector application located 
in  Macintosh HD/Library/Printers/Brother/Utilities/DeviceSelector  or from 
the Model pop-up menu of ControlCenter2.
Other
DifficultiesSuggestions
The  machine  will  not  turn  on. Adverse conditions on the power connection (such as lightning or a power surge)  may have triggered the machine’s internal safety mechanisms. Turn the machine 
off and unplug the power cord. Wait for ten minutes, then plug in the power cord 
and turn the machine on.
If the problem is not solved, turn off the machine. Plug the power cord into a 
different known working outlet and turn on the machine.
Network difficulties (continued)
DifficultiesSuggestions
 
						

							
134
Improving the print qualityC
If you have a print quality problem, print a test page first (Menu, 4 , 2 , 3 ). If the printout looks good, 
the problem is probably not the machine. Check the interface cable connections or try printing a 
different document. If the printout or test page printed from the machine has a quality problem, 
check the following steps first. And then, if you still have a print quality problem, check the chart 
below and follow the recommendation.
aCheck that you use the paper that meets our specifications. (See  Acceptable paper and other 
print media  on page 17.)
Note
To get the best print quality, we suggest using the recommended paper. (See  Acceptable 
paper and other print media  on page 17.)
 
bCheck that the drum units and toner cartridges are installed correctly.
Examples of poor print 
qualityRecommendation
White lines, bands or ribbing 
across the page
 
„ Put in a new drum unit. (See  Replacing the drum units on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Colours are light or unclear on 
the whole page
 
„ Make sure Toner Save mode is off in the control panel of the machine 
or the printer driver.
„ Make sure that you choose the proper media type in the printer driver 
or in the machines Paper Type menu setting. (See  Acceptable paper 
and other print media  on page 17 and Basic tab in the Software 
Users Guide  on the CD-ROM.)
„ Shake all four toner cartridges gently.
„ Wipe the windows of all four LED heads with a dry lint free soft cloth. 
(See  Cleaning the LED heads  on page 157.)
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 maintenance135
C
White streaks or bands down 
the page
 
„Wipe the windows of all four LED heads with a dry lint free soft cloth. 
(See  Cleaning the LED heads  on page 157.)
„ Clean all four drum units. (See  Cleaning the drum unit on page 159.)
„ Identify the missing colour and put in a new toner cartridge. (See 
Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
Coloured streaks or bands 
down the page
 
„ Clean all four corona wires (one for each colour) inside the drum unit 
by sliding the green tab. (See  Cleaning the corona wires 
on page 158.)
„ Make sure the corona wire cleaners are at their home positions ( a).
„ Clean the scanner glass and scanner glass strip. (See  Cleaning the 
scanner glass  on page 156.)
„ Replace the toner cartridge that matches the colour of the streak or 
band. (See  Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
„ Put in a new drum unit. (See  Replacing the drum units on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Vertical streaks in a light 
background
 
„ Wipe the windows of all four LED heads with a dry lint free soft cloth. 
(See  Cleaning the LED heads  on page 157.)
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.
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.
 
						

							
136
Coloured lines across the page
 
„If coloured lines appear at 30 mm intervals, replace the toner 
cartridge that matches the colour of the line. (See  Replacing a Toner 
cartridge  on page 168.)
„ If coloured lines appear at 94 mm intervals, put in a new drum unit 
that matches the colour of the line. (See  Replacing the drum units 
on page 174.)
White spots or hollow print
 
„ If the problem is not solved after printing a few pages, the drum unit 
may be stained. Clean all four drum units. (See  Small spots on the 
printed pages  in Cleaning the drum unit  on page 159.)
„ Make sure that the media type settings in the printer driver and in the 
machines Paper Type menu matches the type of paper you are 
using. (See  Acceptable paper and other print media  on page 17 and 
Basic tab  in the Software Users Guide  on the CD-ROM.)
„ Check the machine’s environment. Conditions such as high humidity 
can cause white spots or hollow print. (See  Choosing a location 
on page 108.)
Completely blank or some 
colours are missing
 
„ Put in a new toner cartridge. (See  Replacing a Toner cartridge 
on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
„ Put in a new drum unit. (See  Replacing the drum units on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Coloured spots at 94 mm
 „ If the problem is not solved after printing a few pages, the drum unit 
may have glue from a label stuck on the drum surface. Clean the 
drum unit. (See  Large spots on the printed pages  in Cleaning the 
drum unit  on page 159.)
„ Put in a new drum unit. (See  Replacing the drum units on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Coloured spots at 30 mm
 
„ Identify the colour causing the problem and put in a new toner 
cartridge. (See  Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.ABCDEFGHIJKLMNOPQRSTUVWXYZ. 012 3456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 012 3456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 012 3456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 012 3456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 012 34567 89. ab cdefghijklmnop qrs tu vwxyz.
ABCDEFGHIJKLMNOPQR STUVWXYZ. 012 34567 89. ab cdefghijklmnop qrs tu vwxyz.
ABCDEFGHIJKLMNOPQR STUVWXYZ. 012 34567 89. ab cdefghijklmnop qrs tu vwxyz.
ABCDEFGHIJKLMNOPQR STUVWXYZ. 012 34567 89. ab cdefghijklmnop qrs tu vwxyz.
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.
94 mm
94 mm
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
3 0 mm
3 0 mm
 
						

							
Troubleshooting and routine maintenance137
C
Toner scatter or toner stain
 
„Check the machine’s environment. Conditions such as high humidity 
and high temperatures may cause this print quality problem. (See  To 
use the machine safely  on page 109.)
„ Identify the colour causing the problem and put in a new toner 
cartridge. (See  Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
„ If the problem continues, put in a new drum unit. (See  Replacing the 
drum units  on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
The colour of your printouts is 
not what you expected „
Make sure Toner Save mode is off in the control panel of the machine 
or the printer driver.
„ Perform the calibration. (See  Calibration on page 164.)
„ Adjust the colour by using the custom setting in the driver and by 
using the control panel of the machine. Colours the machine can print 
and colours you see on a monitor are different. The machine may not 
be able to reproduce the colours on your monitor.
„ If colours appear in the printed grey areas, make sure there is a check 
in the  Improve Grey Colour  check box of the printer driver. (See 
Basic tab  for Windows
® printer driver,  Advanced tab for Macintosh 
printer driver or  Printer Features  for Macintosh BR-Script printer 
driver in the  Software Users Guide  on the CD-ROM.)
„ If shaded areas look dull, remove the check from the  Improve Grey 
Colour  check box.
„ If a printed black graphic is too light, choose  Enhance Black Printing 
mode in the printer driver. (See  Settings Dialog for Windows
® printer 
driver,  Advanced options  for Windows
® BR-Script printer driver,  Print 
Settings  for Macintosh printer driver or  Printer Features for Macintosh 
BR-Script printer driver in the  Software Users Guide on the 
CD-ROM.)
„ Identify the colour causing the problem and put in a new toner 
cartridge. (See  Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
„ Identify the colour causing the problem and put in a new drum unit. 
(See  Replacing the drum units  on page 174.)
You may only need to replace one drum unit to solve the print problem. 
To identify which drum needs to be replaced, please visit us at 
http://solutions.brother.com/
 to view our FAQs and troubleshooting tips.
Examples of poor print 
qualityRecommendation
ABCDEFGHIJKLMNOPQR STUVWXYZ. 012 34567 89. ab cdefghijklmnop qrs tu vwxyz.
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138
All one colour
 
„Identify the colour causing the problem and put in a new drum unit. 
(See  Replacing the drum units  on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Colour misregistration
 
„ Make sure that the machine is on a solid level surface.
„ Perform the auto colour registration using the control panel (see  Auto 
Registration  on page 165) or perform the manual colour registration 
using the control panel (see  Manual Registration on page 165).
„ Identify the colour causing the problem and put in a new drum unit. 
(See  Replacing the drum units  on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
„ Put in a new belt unit. (See  Replacing the belt unit on page 177.)
Uneven density appears 
periodically across the page
 
„ Perform the calibration. (See  Calibration on page 164.)
„ Adjust the contrast or brightness when you are in copy mode. (See 
Adjusting Contrast, Colour and Brightness  on page 89.)
„ Identify the colour that is uneven and put in a new toner cartridge for 
that colour. (See  Replacing a Toner cartridge  on page 168.)
You may only need to replace one toner cartridge to solve the print 
problem. To identify which toner cartridge needs to be replaced, 
please visit us at http://solutions.brother.com/
 to view our FAQs and 
troubleshooting tips.
„ Identify the colour that is uneven and put in a new drum unit. (See 
Replacing the drum units  on page 174.)
You may only need to replace one drum unit to solve the print 
problem. To identify which drum needs to be replaced, please visit us 
at http://solutions.brother.com/
 to view our FAQs and troubleshooting 
tips.
Thin lines do not print „Make sure Toner Save mode is off in the control panel of the machine 
or the printer driver.
„ Change the print resolution.
„ If you use Windows
® printer driver, choose  Improve Pattern 
Printing  or Improve Thin Line  in Settings  of Basic  tab. (See 
Settings Dialog  in the Software Users Guide  on the CD
-ROM.)
Examples of poor print 
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