Brother MFC-8520DN - Page 97

Troubleshooting
89
B
Cover is Open The front cover is not
completely closed.
Close the front cover of the machine.
The ADF cover is not
completely closed.
Close the ADF cover of the machine.
The ADF is open while loading
a document.
Close the ADF cover of the machine, then
press Stop/Exit.
The fuser cover is not
completely closed or paper
was jammed in the back of the
machine when you turned on
the power.
 Close the fuser cover of the machine.
 Make sure paper is not jammed behind the
fuser cover at the back of the machine, then
close the fuser cover and press Start.
(See Paper is jammed at the back of the
machine uu page 99.)
DIMM Error  The DIMM is not installed
correctly.
 The DIMM is broken.
 The DIMM does not meet
the required specifications.
 Turn off the machine and remove the
DIMM.
(uu Advanced User's Guide: Installing
extra memory)
 Confirm the DIMM meets the required
specifications.
(uu Advanced User's Guide: Memory
board)
 Re-install the DIMM correctly. Wait a few
seconds, and then turn it on again.
 If this error message appears again,
replace the DIMM with a new one.
(uu Advanced User's Guide: Installing
extra memory)
Disconnected The other person or other
person’s fax machine stopped
the call.
Try to send or receive again.
Document Jam The document was not
inserted or fed correctly, or the
document scanned from the
ADF was too long.
See Document is jammed in the top of the ADF
unit uu page 95 or Using the automatic
document feeder (ADF) uu page 24.
Drum Error The corona wire on the drum
unit needs to be cleaned.
Clean the corona wire on the drum unit.
(See Cleaning the corona wire uu page 78.)
The toner cartridge is placed in
the machine without the drum
unit.
Put the toner cartridge into the drum unit, and
then re-install the drum unit and toner cartridge
assembly in the machine.
Drum Stop
It is time to replace the drum
un
it.
Replace the drum unit.
(See Replacing the drum unit uu page 71.)
Duplex Disabled The back of the machine is not
closed completely.
Close the back cover of the machine.
Error Message Cause Action