Brother MFC 9840CDW User Manual

Troubleshooting and routine maintenance
129
C
Toner scatter or toner stain on 
the edge of duplex pages
 
CAUTION 
We recommend that you place the drum unit and toner cartridges on a 
clean, flat surface with a piece of disposable paper underneath them in 
case you accidentally spill or scatter toner.
  DO NOT touch the surface of the photosensitive drum.
 
Take all the toner cartridges out of the drum unit and turn the drum 
unit over. Wipe the toner on the edge of drum unit with a dry lint free 
soft...

130
Setting dial tone detectionC
When you send a fax automatically, by 
default your machine will wait for a fixed 
amount of time before it starts to dial the 
number. By changing the Dial Tone setting to 
Detection you can make your machine dial 
as soon as it detects a dial tone. This setting 
can save a small amount of time when 
sending a fax to many different numbers. If 
you change the setting and start having 
problems with dialling you should change 
back to the default No Detection setting....

Troubleshooting and routine maintenance
131
C
Error and maintenance messagesC
As with any sophisticated office product, error and maintenance messages may be displayed. The 
most common error and maintenance messages are shown below.
Error MessageCauseAction
Access ErrorThe device is removed from the 
USB direct interface while the 
data is processing.Press Stop/Exit. Reinsert the device and try to 
print with direct print or PictBridge.
BT Call Sign On
(U.K. only)BT Call Sign is set to On. You 
cannot...

132
Change Parts
Fuser UnitIt is time to replace the fuser unit. Call your Brother dealer to purchase the fuser 
unit.
Change Parts
Laser UnitIt is time to replace the laser unit. Call your Brother dealer to purchase the laser 
unit.
Change Parts
PF kit MPIt is time to replace the paper 
feeding kit for the MP tray.Call your Brother dealer to purchase the 
PF Kit MP.
Change Parts
PF kit 1It is time to replace the paper 
feeding kit for Tray 1.Call your Brother dealer to purchase the 
PF Kit 1.
Change...

Troubleshooting and routine maintenance
133
C
Cover is Open   
Close the Back 
Cover.The back cover is not closed 
completely.Close the back cover of the machine.
DisconnectedThe other person or other 
person’s fax machine stopped the 
call.Try to send or receive again.
Document JamThe document was not inserted 
or fed properly, or the document 
scanned from the ADF was too 
long.See Document jamson page 138 or Using the 
ADF (automatic document feeder)on page 20.
Drum ErrorThe corona wires on the drum...

134
No PaperThe machine is out of paper or 
paper is not properly loaded in the 
paper tray.Do one of the following:
„Refill the paper in the paper tray or MP tray.
„Remove the paper and load it again.
No Response/BusyThe number you dialled does not 
answer or is busy.Verify the number and try again.
No TrayThe paper tray is not completely 
closed.Close the paper tray properly.
No Waste TonerThe waste toner box is not 
installed.Install the waste toner box. (See Replacing the 
waste toner boxon page...

Troubleshooting and routine maintenance
135
C
RegistrationRegistration failed. Press Mono Start or Colour Start and try 
again.
Do one of the following:
„Try Manual Registration, Menu, 4, 8. 
(See Manual Registration in the Software 
User’s Guide on the CD-ROM.)
„Put in a new belt unit. (See Replacing the 
belt uniton page 181.)
„Put in a new drum unit. (See Cleaning the 
drum uniton page 159.)
„ Replace the empty toner cartridge with a 
new one. (See Replacing a toner 
cartridgeon page 169.)
„Turn off...

136
Toner Low
Prepare New Black(K) 
Toner Cartridge.1
1The toner 
cartridge colour 
which is near the 
end of life is 
shown in the 
message.
If the LCD shows Toner Low, 
you can still print; however, the 
machine is telling you that the 
toner cartridge is near the end of 
its life and the toner will soon run 
out.Order a new toner cartridge now for the toner 
cartridge colour that is low.
Too Many FilesThere are too many files stored 
on the USB flash memory drive.Reduce the number of files stored on...

Troubleshooting and routine maintenance
137
C Checking if the machine has 
faxes in its memoryC
If the LCD shows an error message then you 
can check to see if there are faxes in the 
machine’s memory.
aPress Menu, 9, 0, 1.
bDo one of the following:
„If the LCD shows No Data, there 
are no faxes left in the machine’s 
memory.
Press Stop/Exit.
„If the LCD shows Dial & Start, 
there are faxes in the machine’s 
memory.
• You can send the faxes to 
another fax machine. (See 
Transferring faxes to another fax...

138
Note
If there is an error message on the 
machine’s LCD after the faxes have been 
sent, disconnect the machine from the 
power source for several minutes, and 
then reconnect it.
If you choose Backup Print On, the 
machine will also print the fax at your 
machine so you will have a copy. This is a 
safety feature in case there is a power 
failure before the fax is forwarded or a 
problem at the receiving machine. The 
machine can store faxes up to 60 hours if 
there is a power failure.
 
Document...