Brother MFC 8420 User Manual

							IMPORTANT INFORMATION   21 - 7
13Wait until pages have exited the MFC before picking them up.
14Never push objects of any kind into this product through cabinet 
slots, since they may touch dangerous voltage points or short 
out parts resulting in the risk of fire or electric shock. Never spill 
liquid of any kind on t he product. Do not at tempt to service this 
product yourself because opening or removing covers may 
expose you to dangerous volt age points and other risks and 
may void your warranty. Refer all servicing to a Brot her 
Authorized Service Center. For the location of your nearest 
Brother Authorized Service Cent er, please call In USA: 
1-800-284-4357 or In Canada: 1-877-BRO THER. (See Brother 
numbers on page i. )
15Unplug this product from the wall outlet and refer servicing to 
Authorized Service Personnel under the following conditions:  
■When the power cord is damaged or frayed.
■If liquid has been spilled into the product .
■If the product has been exposed to rain or wat er.
■If the product does not operate normally when the operating 
instructions are followed. Adjust only those controls that are 
covered by the operating instructions. Improper adjustment 
of other controls may result in damage and will often require 
extensive work by a qualified t echnician to rest ore t he 
product to normal operation.
■If the product has been dropped or the cabinet has been 
damaged.
■If the product exhibits a distinct change in perf ormance, 
indicating a need for service.
16To protect your product against  power surges, we recommend 
t he use of a power protect ion device (Surge Protector).
17To reduce the risk of fire,  electric shock and injury to persons, 
note the following: 
■Do not use this product near appliances that use water, a 
swimming pool or in a wet basement.
■Do not use the MFC’s telephone during an electrical storm 
(there is the remote possibility of an electrical shock) or to 
report a gas leak in t he vicinity of the leak.
■Use only the power cord indicated in this manual.
 
						

							21 - 8   IMPORTANT INFORMATION
Trademarks
The Brother logo is a regist ered trademark of Brother Industries, Ltd.
Brother is a registered trademark of Brother Industries, Ltd.
Multi-Function Link is a registered trademark of Brother International 
Corporation.
© Copyright 2003 Brother Industries, Ltd. All rights reserved.
Windows, Microsoft and Windows NT are registered t rademarks of 
Microsoft in the U.S.  and other countries.
Macintosh, QuickDraw, iMac and iBook are trademarks or registered 
trademarks of Apple Computer, Inc.
Postscript and Postscript  Level 3 are registered trademarks or 
trademarks of Adobe Syst ems Incorporated.
PaperPort and TextBridge are registered trademarks of ScanSoft, Inc.
Presto! PageManager is a registered trademark of NewSoft 
Technology Corporation.
Each company whose software title is mentioned in this manual has 
a Software License Agreement specific to its proprietary programs.
All ot her brand and product name s me nti one d in this User’s 
Guide are registered trademarks of their respective companies.
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   22 - 1
22
 
Troubleshooting 
Error messages
As with any sophisticated office product, errors may occur. If t his 
happens,  your MFC identifies the problem and displays an error 
message. The most common error messages are shown below.
You can correct most problems by yourself . If you need additional 
help, call the Brother fax back system (USA only).
I n USA onl y: 1-800-521-2846
Troubleshooting and routine 
maintenance
IMPORTANT
For technical help, you must call the country where you bought the 
MFC. Calls must be made from within that country.
ER ROR MES SAGES
ER ROR 
MESS AGECAUSE ACTION
C han ge Dr um 
S oonThe drum unit is near the end of its life. Use the drum unit until you have a 
pr in t  q ua lit y  p rob lem ; th en  r ep lac e 
the drum unit with a new one.
The drum counter was not reset. 1. Open the front cover, and then 
press 
Clear/Back.
2. Pr es s  1 to reset.
C hec k 
O rig ina lThe originals were not inserted or fed 
properly, or original scanned from ADF was 
longer than about 36 inches (90cm).See Original  j ams on page 22-4.
C hec k P ap er
Check Paper #1
Check Paper #2The MFC is out of paper or paper is not 
properly loaded in the paper tray. Refill the paper in the paper tray or 
MP  tr a y.
—OR—
Remove the  paper and  load it  again.
Check Paper MPPaper in the MP tray runs out. Reload paper. (See To load paper or 
other media in the multi-purpose 
tray (MP tray)  (For  MFC-8820D and 
MFC-8820DN) on page 2-8.)
C hec k P ap er 
S ize
Wh en y ou s ee t hi s er ror , the paper in the paper 
tray does not match the paper size you set in 
Menu, 1, 3.
Load the appropriate size paper or 
change the default setting. (See 
Setting the Mode Timer on page 
4- 5 . )
 
						

							22 - 2   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Ch eck  Sc an  
Lo ckThe scanner  lock  is  locked.  Release the scanner lock lever, and 
then press Stop/Exit.
Co mm.  Er ro rPoor phone line quality caused 
communication error. Try the call again. If problem 
continues, call Telephone Company 
to check your phone line.
Co nne cti on  
Fa ilYou tried to pol l a fax machine that is not in 
Polled Waiting mode.Verify the other party’s polling setup.
Co oli ng Do wn
Wa it For  A  
Wh ileThe temperature of the drum unit or toner 
cartridge is too hot. The MFC will pause its 
current print job and go in
to cooling down mode. During the cooling 
down mode, you will hear the cooling fan 
running while the display on the MFC shows 
Coo lin g Do wn, and 
Wai t F or  A  Wh ile.You must wait 20 minutes for it to 
cool.
Co ver  Op en
PL S C los e 
Co verThe front cover was not completely closed.  Close the front cover for the drum 
unit.
Di sco nne ct edThe other party or other party’s fax machine 
terminated the  call.Try to transmit or receive again.
DX  Le ver  
Er rorThe paper adjustment lever for duplex 
printing is not correctly set for the paper size.Set the duplex lever to the correct 
position. (See To use Automatic 
Duplexing for fax, copy and print 
operations (For MFC-8820D and 
MFC-8820DN)  on page 2-10.)
Fa ce Up Op enThe face-up  output  tray  is  open. Please close the face-up output tray.
Fu ser  Op enThe fuser cover is open. Please  close the  jam  clear  cover. 
(See Paper jams on page 22-6.)
Ma chi ne Err or 
XXMFC has a mechanical problem. Call Brother Customer Service and 
tell them the Machine Error number.
In USA: 1-800-284-4329
In Canada: 1-877-BROTHE R
ERROR MESS AGES
ERROR 
ME SSAGECAUSE ACTION
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   22 - 3
O ut Of Mem oryYou can’t store data in the memory. (Fax sending in process)
Press Stop and wait until the other 
operations in progress finish and 
then try again.
—OR—
Cle ar  t h e d a t a in  t h e  m e mo r y .  ( S ee  
Out of Memory message on page 
10 - 5 . )
(Copy operation in process)
Press Stop and wait until the other 
operations in process finish and 
then try again.
—OR—
Cle ar  t h e d a t a in  t h e  m e mo r y .  ( S ee  
Out of Memory message on page 
10 - 5 . )
—OR—
Add an optional memory. (See 
Memory board on page 23-1.)
(Printing operation in process)
Reduce print resolution. (See Print 
Quality  on page 12-5.)
—OR—
Cle ar  t h e d a t a in  t h e  m e mo r y .  ( S ee  
Out of Memory message on page 
10 - 5 . )
—OR—
Add an optional memory. (See 
Memory board on page 23-1.)
No 
Response/BusyThe number you dialed  does not answer or is 
busy.Verify the number and try again.
N ot 
R egi ste re dYou tried to access a One-Touch or 
Speed-Dial number that is not programmed.Set up the One-Touch or Speed-Dial 
nu m b er .  ( S e e Storing One-Touch 
Dial numbers on page 7-1 and 
Storing Speed-Dial numbers on 
page 7-2.)
P ls Ope n 
C ove rA page,  piece of paper or paper clip, etc. may 
be jammed inside the MFC.Open the front cover.  If you see  any 
jammed paper or other item, gently 
pull  it  out, then close the  front cover. 
If the error message remains, open 
and close the front cover again.
If the MFC cannot reset itself and 
return to the date and time prompt, it 
will display M ach in e E rr or  XX.
Please call Brother Customer 
Service and tell them the Machine 
Error number:
In USA: 1-800-284-4329
In Canada: 1-877-BROTHER
No DX TrayYou tried  to make  duplex printing  with duplex 
cover open.Install the duplex tray correctly. (See 
Paper is jammed in the duplex tray 
(For MFC-8820D and 
MFC-8820DN) on page 22-11.)
ER ROR MES SAGES
ER ROR 
MESS AGECAUSE ACTION
 
						

							22 - 4   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Original jams
Based upon where the original is jammed, follow the appropriate set 
of instructions to remove it.
Original is jammed in the top of the ADF unit.
1Take out any paper from 
the ADF that is not 
jammed.
2Lift the ADF cover.
3Pull the jammed original 
out to the right.
4Close the ADF cover.
5Press Stop/Exit.
Pa per  Ja mThe paper is jammed in the MFC. See Paper jams on page 22-6 or 
Paper is jammed in the duplex tray 
(For MFC-8820D and 
MFC-8820DN)  on page 22-11.
To ner  Em pt yToner cartridge is not installed.
—OR—
Toner is used up and printing is not possible.Reinstall the toner cartridge.
—OR—
Replace the toner cartridge with a 
new one. (See Replacing the toner 
cartridge on page 22-28.)
To ner  Lo wIf the LCD shows To ner  L ow, you can still 
pr in t .
But the toner is depleted and the MFC is 
telling you that the toner will soon run out.Order a new toner cartridge now.
ERROR MESS AGES
ERROR 
ME SSAGECAUSE ACTION
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   22 - 5
Original is jammed inside the ADF unit.
1Take out any paper f rom 
t he ADF that is not 
jammed.
2Lift the document cover.
3Pull t he jammed original 
out to the right.
4Close the document 
cover.
5Press Stop/Exit.
—OR—
1Take t he ADF support out of  the ADF unit.
2Pull the jammed original out  to the right .
3Press Stop/Exit.
 
						

							22 - 6   TROUBLESHOOTING AND ROUTINE MAINTENANCE
Paper jams
To clear paper jams, please follow the steps in this section.
WARNING
Af ter you have just used the MFC, some parts inside the MFC are 
extremely hot. When you open the front cover or back output tray of 
the MFC, never touch the shaded parts shown in the f ollowing 
diagram.
Clear the jammed paper as follows. 
If the jammed paper is removed completely by using t he inf ormation 
in the following steps, you can install the paper tray first, and then 
close the front cover and the MFC will resume printing automatically.
■If a paper jam occurs when using the optional lower tray unit, 
check for correct  installation of the upper paper tray.
■Always remove all paper from the paper tray and straighten 
the stack when you add new paper. This helps prevent 
multiple sheets of paper from feeding through the MFC at 
one time and reduces paper jams.
HOT!HOT!
Front view Back  view
 
						

							TROUBLESHOOTING AND ROUTINE MAINTENANCE   22 - 7
1Pull the paper tray completely out  of the MFC.
2Pull the jammed paper up and out of the MFC.
3Press the cover release button and then open the front cover.
4Pull out the drum unit assembly. Pull the jammed paper up and 
out of the MFC. If you cannot remove the drum unit  assembly 
easily at this time, do not use extra force. I nstead, pull the edge 
of the jammed paper from the paper tray.
 
						

							22 - 8   TROUBLESHOOTING AND ROUTINE MAINTENANCE
WARNING
To prevent damage t o the MFC caused by st atic electricity,  do not 
touch the electrodes shown in the following diagram.
5Open the back output tray. Pull the jammed paper out of the 
fuser unit . If the paper jam can be cleared, go to St ep 7. 
If you have to pull t he paper t oward t he back of the MFC, the 
fuser may get dirty wit h toner powder and it may scatter on the 
next print outs. Print a few copies of the test page until the 
scatt ering of toner stops.