Brother MFC 8440 User Manual

TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 10
8Push the lock lever down and take the toner cartridge out of the 
drum unit assembly. Take out the jammed paper if there is any 
inside the drum unit.
9Put the drum unit assembly back in the MFC.
10Put the paper tray in the MFC.
11Close the front cover.
 

12 - 11   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Paper is jammed in the duplex tray 
(For MFC-8640D, MFC-8840D and MFC-8840DN)
1Pull the duplex tray and paper tray out of the MFC.
2Pull the jammed paper out of the MFC.
3Put the duplex tray and paper tray back into the MFC.
 

TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 12
■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 fax, copy and print operations (For 
MFC-8640D, MFC-8840D and MFC-8840DN)  on page 
2-10.)
 

12 - 13   TROUBLESHOOTING AND ROUTINE MAINTENANCE
If you are having difficulty with your MFC
If you think there is a problem with the way your faxes look,  make a 
copy first . If the copy looks good, the problem is probably not your 
MFC. Check the chart below and follow the troubleshooting tips.
DIFFICULTYSUGGESTIONS
Printing or Receiving Faxes
Condensed print and 
horizontal streaks or the top 
and bottom of sentences are 
cut off. If your copy looks good, you probably had a bad connection, with...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 14
Vertical black lines when 
sending.If the copy you made shows the same problem, your scanner is dirty. 
(See 
Cleaning the scanner  on page 12-25.)
Handling Incoming Calls
MFC ‘Hears’ Voice as CNG 
Tone. If your MFC is set to Easy Receive ON, it is more sensitive to sounds. 
Your MFC may mistakenly interpret certain voices or music on the line 
as a calling fax machine and respond with fax receiving tones. 
Deactivate the fax by pressing 
Stop/Exit. Try...

12 - 15   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Printer Difficulties
The MFC does not print. Check the following:
 The MFC is plugged in and the power switch turned On. (See the Quick Setup Guide.) 
 The toner cartridge and drum unit are installed properly.  (See  Replacing the drum unit  on page 12-34.)
 The interface cable is securely connected between the MFC and  computer. (See the Quick Setup Guide.) 
 Check to see if LCD is showing an error message.  (See  Error messages  on page 12-1.)
The...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 16
Software Difficulties
Cannot install software or 
print.Run the 
MFC-Pro Suite Repair and Install  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.
Cannot print when using 
Adobe Illustrator. Try to reduce the print resolution.
When using ATM fonts, some 
characters are missing or 
some...

12 - 17   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  and Media Type  in Software User’s Guide 
on the CD-ROM.)
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...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   12 - 18
Improving the print quality
This section provides information on the following topics:
Examples of poor print 
qual ityRecommendation
Faint Check the printer’s environment. Conditions such as humidity, high 
temperatures, and so on may cause this print fault. (See 
Choosing a 
location  on page ix.)
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 MFC is not...

12 - 19   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) intervals If 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.
Do...