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 static 
or interference on the telephone line. If the copy looks bad, clean the 
scanner area. If there is still problem, call Brother Customer Service at 
1-800-284-4329 (
in USA) or 1-877-BROTHER ( in Canada).
Poor quality print. See  Improving the print quality on page 12-18.
Vertical black lines when 
receiving. Sometimes you may see vertical streaks/black lines on the faxes you 
receive. Your MFC’s primary corona wire for printing may be dirty, or the 
sending party’s fax scanner may be dirty. Clean your primary corona 
wire (See 
Cleaning the drum unit  on page 12-27), or ask the sender to 
make a copy to see if the problem is with the sending machine. Try 
receiving from another fax machine. If the problem continues, call 
Brother Customer Service at 
1-800-284-4329 ( In USA) or 1-877-BROTHER ( In Canada).
Horizontal streaks; lines are 
missing. You may get a fax with horizontal streaks or with missing lines. Usually 
this is caused by a poor telephone connection. Ask the other party to 
send the fax again.
Received faxes appear as split 
or blank pages. If the received data is divided and printed on two pages or if you get an 
additional blank page, your Paper Size setting may not be correct for the 
paper you are using (See 
Type and size of paper on page 2-1). Make 
sure that auto reduction function setting is turned on. (See  Printing a 
reduced incoming fax (Auto Reduction)  on page 5-5.)
Phone Line or Connections
Dialing does not work Check for a dial tone. Change  Tone/Pulse setting. (See  Setting Tone 
and Pulse dialing mode (For Canada only)  on page 4-4.) Check all line 
cord connections. Check power cord connection. Send a manual fax by 
pressing  Hook, or by lifting the external handset and dialing the number. 
Wait to hear fax receiving tones before pressing  Start.
The MFC does not answer 
when called. Make sure the MFC is in the correct receiving mode for your setup. 
(Se e 
Basic sending operations  on page 6-6.) Check for a dial tone. If 
possible, call your MFC to hear it answer. If there is still no answer, 
check the telephone line cord connection. If there is no ringing when you 
call your MFC, ask your telephone company to check the line.
Sending Faxes
Poor sending quality. Try changing your resolution to  Fine or S.Fine . Make a copy to check 
your MFC’s scanner operation. If copy quality is not good, clean the 
scanner. (See  Cleaning the scanner  on page 12-25.)
Transmission Verification 
Report says ‘RESULT:NG’ or 
‘RESULT:ERROR’. There is probably temporary noise or static on the line. Try sending the 
fax again. If you send a PC FAX message and get ‘RESULT:NG’ or, on 
the Transmission Verification Report, your MFC may be out of memory. 
To gain extra memory, you can turn off Fax Storage (See 
Setting Fax 
Storage  on page 8-3), print fax messages in memory (See  Polling on 
page 5-9) or cancel a Delayed Fax or Polling Job (See  Canceling a job 
while scanning the original  on page 6-11). If the problem continues, ask 
the telephone company to check your phone line.
 
						

							
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 avoiding this problem by 
turning Easy Receive to OFF. (See  Easy Receive on page 5-4.)
Sending a Fax Call to the 
MFC. If you answered at the MFC, press 
Start and hang up immediately. If 
you answered on an external or extension phone, press your Fax 
Receive Code (default setting is ( 51). When your MFC answers, 
hang up.
Custom features on a single 
line. If you have Call Waiting, Call Waiting/Caller ID, RingMaster, Voice Mail, 
an answering machine, an alarm system or other custom feature on a 
single phone line with your MFC, it may create a problem sending or 
receiving fax data.
For Example:
 Your Brother MFC handles the Caller ID subscriber 
services. However, if you subscribe to Call Waiting or some other 
custom service and its signal comes through the line while your MFC is 
sending or receiving a fax, the signal can temporarily interrupt or disrupt 
the fax data. Brother’s ECM feature should help overcome this problem. 
This condition is related to the telephone system industry and is 
common to all devices that send and receive information on a single, 
shared line with custom features. If avoiding a slight interruption is 
crucial to your business, a separate line with no custom features is 
recommended.
Menu Setting Difficulties
The MFC beeps when you try 
to access the Setup Receive 
and Setup Send menus. Make sure that MFC is in Fax mode. If the Fax   key is not 
illuminated, press it to turn on Fax mode. Setup Receive setting 
(
Menu , 2, 1 ) and Setup Send setting ( Menu, 2, 2 ) are available only 
when the MFC is in Fax mode.
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. 
(See 
Cleaning the scanner  on page 12-25 and Cleaning the drum unit  
on page 12-27.)
DIFFICULTYSUGGESTIONS
 
						

							
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 MFC prints unexpectedly 
or it prints garbage. Reset the MFC 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 MFC.
The MFC 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 MFC cable correctly.
The MFC 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.
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.
DIFFICULTYSUGGESTIONS
 
						

							
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 characters are printed in 
their place. If you are using Windows
® 98/98SE/Me, select ‘Printer Settings’ from 
the ‘Start’ menu. Select the properties of the ‘Brother MFC-8440, 
MFC-8640D or MFC-8840D’. 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 MFC is on (plugged into the AC power outlet and 
turned the power switch on) and that it is connected directly to the 
computer using a 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 MFC 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 Setup 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.
Paper Handling Difficulties
The MFC 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 MFC 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 in Software User’s Guide on the CD-ROM.)
How can I clear paper jams? See  Paper jams on page 12-6.
DIFFICULTYSUGGESTIONS
 
						

							
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  Setting the Paper Type  and Media Type  in Software 
User’s Guide on the CD-ROM.)
Printouts are too light. Set Toner Save mode to off in the Advance tab in the printer driver.  (Se e Toner Save  in Software User’s Guide on the CD-ROM.)
Network Difficulties
I cannot print over the Network Make sure that your MFC 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 MFC 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   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 connected to a computer, turn off Toner Save mode 
in the MFC itself. (See  Toner Save on page 4-9.)
Try installing a new toner cartridge. (See  Replacing the toner cartridge 
on page 12-28.)
Try installing a new drum unit. (See  Replacing the drum unit on page 
12-34.)
Gray background Make 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 ix.)
Use a new toner cartridge. (See  Replacing the toner cartridge on page 
12-28.)
Use a new drum unit. (See  Replacing the drum unit on page 12-34.)
Ghost Make 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 
12-34.)
Toner specks Make 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 12-34.)
Hollow print Make 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 ix.)
All black You 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 12-27.)
The drum unit may be damaged. Put in a new drum unit. (See  Replacing 
the drum unit  on page 12-34.)
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
CDEF
defgBC
bcd23
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
 
						

							
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 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.
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 12-34.)
Examples of poor print 
qualityRecommendation
3.7 in.
(94 mm)
3.7 in.
(94 mm)
94 mm
(3.7 in.)
94 mm
(3.7 in.)
Photosensitive drum