Brother 7820 N Manual

							
Troubleshooting and routine maintenance11 - 6
11
Document jams 
If the document is jammed, follow the steps 
below.
Document is jammed in the top of the 
ADF unit
1Take out any paper from the ADF that is 
not jammed.
2Open the ADF cover.
3Pull the jammed document out to the 
left.
4Close the ADF cover.
Press Stop/Exit .
Document is jammed inside the ADF 
unit
1Take out any paper from the ADF that is 
not jammed.
2Lift the document cover.
3Pull the jammed document out to the 
right.
4Close the document cover.
5Press Stop/Exit .
— OR —
1Pull the jammed document out to the 
right.
2Press  Stop/Exit . 
						

							
Chapter 11
11 - 7
Paper jams
To clear paper jams, please follow the steps 
in this section.
Paper is jammed inside the machine
1Pull the paper tray completely out of the 
machine.
2Pull the jammed paper out of the 
machine.
3Open the front cover. 
4Pull out the drum unit and toner 
cartridge assembly. The jammed paper 
may be pulled out with the toner 
cartridge and drum unit assembly, or 
this may release the paper so you can 
pull it out of the paper tray opening.
5If you can not remove the drum unit and 
toner cartridge assembly easily, do not 
use extra force. Instead, lift the scanner 
cover and use both hands to carefully 
pull the jammed paper up and out of the 
output tray opening.
6Close the scanner cover.
WARNING
After you have just used the machine, 
some parts inside the machine are 
extremely hot. When you open the front 
cover or back cover of the machine, never 
touch the shaded parts shown in the 
following diagram. 
						

							
Troubleshooting and routine maintenance11 - 8
11
7Put the drum unit and toner cartridge 
assembly back into the machine.
8Close the front cover.
9Put the paper tray in the machine.
Paper is jammed at the back of the 
machine
1Open the front cover. 
2Pull out the drum unit and toner 
cartridge assembly.
3Open the back cover. 
CAUTION
To prevent damage to the machine 
caused by static electricity, do not touch 
the electrodes shown in the following 
diagram. 
						

							
Chapter 11
11 - 9
4Pull the tab toward you to open the rear 
chute cover. 
5Pull the jammed paper out of the fuser 
unit. If the jammed paper cannot be 
pulled out easily, push down the blue tab 
with one hand as you gently pull out the 
paper with the other hand.
6Close the back cover.
7Put the drum unit and toner cartridge 
assembly back into the machine.
8Close the front cover. 
						

							
Troubleshooting and routine maintenance11 - 10
11
Paper is jammed inside the drum unit 
and toner cartridge assembly
1Open the front cover.
2Pull out the drum unit and toner 
cartridge assembly. 
3Hold down the lock lever on the left and 
pull the toner cartridge out of the drum 
unit. Take out the jammed paper if there 
is any inside the drum unit.
4Put the toner cartridge back into the 
drum unit until you hear it lock into place. 
If you put it in properly, the lock lever will 
lift automatically.
5Put the drum unit and toner cartridge 
assembly back into the machine.
6Close the front cover. 
						

							
Chapter 11
11 - 11
If you are having difficulty with your machine
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 machine. Check the chart below and follow the 
troubleshooting tips.
The Brother Solutions Center offers the latest FAQs and troubleshooting tips.
Visit us at http://solutions.brother.com
.
DIFFICULTYSUGGESTIONS
Printing or Receiving Faxes
 Condensed print
 Horizontal streaks
 Top and bottom sentences are cut  off
 Missing lines Usually this is caused by a poor telephone connection. If your copy looks good, 
you probably had a bad connection, with static or interference on the telephone 
line. Ask the other party to send the fax again.
Poor print quality. See  Improving the print quality on page 11-16.
Vertical black lines when receiving Sometimes you may see vertical streaks/black lines on the faxes you receive.  Your machine’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 corona wire  on page 11-24), 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 or your dealer for service.
Received faxes appear as split or 
blank pages. If the received faxes are divided and printed on two pages or if you get an extra 
blank page, your Paper Size setting may not be correct for the paper you are 
using. (See 
Setting the Paper Size  on page 2-5.) Make sure that auto reduction 
menu setting is turned on. (See  Printing a reduced incoming fax (Auto Reduction)  
on page 4-4.)
Phone Line or Connections
Dialling does not work. Check for a dial tone. Change  Tone/Pulse setting. (See  Tone or Pulse  on page 
5-4.) Check all line cord connections. Check power cord connection.
If an external phone is connected to the machine, send a manual fax by lifting the 
handset of the external phone and dialling the number. Wait to hear fax receiving 
tones before pressing  Start.
The machine does not answer 
when called. Make sure the machine is in the correct receiving mode for your setup. (See 
Basic 
sending operations  on page 3-5.) Check for a dial tone. If possible, call your 
machine 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 machine, 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 
machine’s scanner operation. If the copy quality is not good, clean the scanner. 
(See  Cleaning the scanner glass  on page 11-22.) 
						

							
Troubleshooting and routine maintenance11 - 12
11
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’ on the Transmission 
Verification Report, your machine may be out of memory. To gain extra memory, 
you can turn off Fax Storage (See 
Turning off Remote Fax Options on page 6-3), 
print fax messages in memory (See  Printing a fax from the memory on page 4-4) 
or cancel a Delayed Fax or Polling Job (See  Cancelling a fax in progress on page 
3-8). If the problem continues, ask the telephone company to check your phone 
line.
If you frequently get transmission errors due to possible interference on the phone 
line, try changing the Compatibility setting to  Normal or Basic . 
(See  Compatibility  on page 11-20.)
Vertical black lines when sending. If the copy you made shows the same problem, your scanner is dirty.  (See Cleaning the scanner glass  on page 11-22.)
Handling Incoming Calls
The machine ‘Hears’ Voice as CNG 
Tone. If Fax Detect is set to 
On, your machine is more sensitive to sounds. It may 
mistakenly interpret certain voices or music on the line as a calling fax machine 
and respond with fax receiving tones. Deactivate the machine by pressing 
Stop/Exit . Try avoiding this problem by turning Fax Detect to  Off. 
(See  Fax Detect  on page 4-3.)
Sending a Fax Call to the machine. If you answered on an external or extension phone, press your Fax Receive Code  (default setting is ( 51). When your machine answers, hang up.
Custom  features  on  a  single  line. If you have Call Waiting, Call Waiting/Caller ID, Voice Mail, an answering machine,  an alarm system or other custom feature on a single phone line with your machine, 
it may create a problem sending or receiving faxes.
For Example: If you subscribe to Call Waiting or some other custom service and 
its signal comes through the line while your machine is sending or receiving a fax, 
the signal can temporarily interrupt or disrupt the faxes. 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 machine beeps when you try to 
access the Setup Receive and 
Setup Send menus. If the Fax   key is not illuminated, press it to turn on Fax mode. The Setup 
Receive setting (
Menu/Set, 2 , 1 ) and Setup Send setting ( Menu/Set, 2,  2) are 
available only when the machine 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 glass  on page 11-22 and  Cleaning the corona wire  on page 11-24.)
DIFFICULTYSUGGESTIONS 
						

							
Chapter 11
11 - 13
Printer Difficulties 
The machine does not print. Please make sure:  The machine is plugged in and the power switch is turned On.
—OR —
 The toner cartridge and drum unit are installed properly. (See  Replacing the 
drum unit (DR-2000)  on page 11-28.)
— OR —
 The interface cable is securely connected between the machine and computer.  (See the Quick Setup Guide.) 
— OR —
 The correct printer driver has been installed and selected.
— OR —
 Check to see if the LCD is showing an error message. (See  Error messages on 
page 11-1.)
— OR —
 The machine is online. Click  Start and then  Printer and Faxes . Right-click 
‘Brother MFC-7420 or MFC-7820N’. Make sure that “Use Printer Offline” is 
unchecked.
The machine prints unexpectedly 
or it prints garbage. (For MFC-7420) 
When you turn off the machines power switch its memory will be cleared. To 
check whether the machine has faxes in its memory see 
Checking if the machine 
has faxes in its memory  on page 11-5. If there are faxes you need to save them 
before following the suggestions below (See  Transferring faxes to your PC on 
page 11-5 or  Forwarding faxes to another fax machine  on page 11-5.)
Turn off the machines power switch and then on again. If the error message 
continues, leave the machine for several minutes and try it again.
(For MFC-7820N)  
Turn off the machines power switch and then on again. If the error message 
continues leave the machine for several minutes and then try it again. (The 
machine can be turned off for up to 4 days without losing faxes stored in the 
memory.)
The machine prints first couple of 
pages correctly, then some pages 
have text missing. Your computer is not recognizing the machine’s input buffer full signal. Please 
make sure you connect the machine’s cable correctly. (See the Quick Setup 
Guide.)
The machine cannot print full pages 
of a document.
Out of Memory  message occurs. Reduce the printing resolution. (See 
Advanced tab in the Software User’s Guide 
on the CD-ROM.)
Reduce the complexity of your document and try again. Reduce the graphic quality 
or the number of font sizes within your application software. 
Turn on the Page Protection function. (See  Device Options in the Software User’s 
Guide on the CD-ROM.)
My headers or footers appear when 
I view my document on the screen 
but do not appear when I print 
them. Your machine can print 62 lines per page. The top two lines and bottom two lines 
are a restricted area that will not accept print. Adjust the top and bottom margins 
in your document to allow for this.
DIFFICULTYSUGGESTIONS 
						

							
Troubleshooting and routine maintenance11 - 14
11
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.
Software Difficulties
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.
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.)
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-7420 or MFC-7820N’. 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 machine is on (plugged into the electrical socket and the power 
switch turned on) and that it is connected directly to the computer using the 
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 machine 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 your 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’ Error Message 
appears.
DIFFICULTYSUGGESTIONS 
						

							
Chapter 11
11 - 15
Paper Handling Difficulties
The machine does not load paper.
The LCD shows  No Paper Fed or 
Paper Jam . 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. Check that the manual feed mode is not selected in the printer 
driver.
If the LCD shows 
Paper Jam and you still have a problem, see  Paper jams on 
page 11-7.
The machine does not feed paper 
from the manual feed slot. Reinsert the paper firmly, load one sheet at a time. Make sure that manual feed 
mode is selected in the printer driver.
How  can  I  load  envelopes? You can load envelopes from the manual feed slot. 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. You should refer to the manual 
provided with your software application.
What paper can I use? You can use plain paper, recycled paper, envelopes, transparencies and labels  that are made for laser machines. (For information on paper you can use, see 
About paper on page 1-9.)
How can I clear paper jams? See  Paper jams on page 11-7.
Print Quality Difficulties
Printed pages are curled. Low quality thin or thick paper can cause this problem. Make sure you select the  Paper Type that suits the media type you use. (See  About paper on page 1-9.)
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  About paper  on page 1-9 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, turn off  Toner Save mode in the machine’s menu setting. (See  Toner Save on page 2-6.)
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.)
Network Difficulties (MFC-7820N only)
I cannot print over the Network Make sure that your machine is powered on and is online and in Ready mode.  Print a Network Configuration list and check the current Network settings printed 
in this list. (See Printing reports on page 7-2.) Reconnect the LAN cable to the hub 
to verify that the cabling 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 machine shows  LAN Active.
DIFFICULTYSUGGESTIONS