User Manual

Table Of Contents
Error Message Cause Action
available for automatic 2-sided
printing.
Load the correct size of paper in the
tray and set the tray for that paper
size.
Choose a paper size supported by 2-
sided printing.
Paper size available for automatic 2-
sided printing is A4.
The paper in the tray is not the
correct size and is not available for
automatic 2-sided printing.
Size Mismatch
The paper in the tray is not the
correct size.
Load the correct size of paper in the
tray and set the size of paper for the
tray.
Toner Error
One or more toner cartridges are not
installed or not installed correctly.
Pull out the drum units. Remove all of
the toner cartridges, and then put
them back into the drum units.
Toner Low
If the LCD displays this message, you
can still print. The toner cartridge is
near the end of its life.
Order a new toner cartridge before
the LCD displays Replace Toner.
WT Box End Soon
The waste toner box is almost full. Order a new waste toner box before
the LCD displays Replace WT Box.
DCP-L3550CDW/MFC-L3710CW/MFC-L3730CDN/MFC-L3750CDW/MFC-L3770CDW
Error Message
Cause Action
2-sided Disabled
The back cover of the machine
is not closed completely.
Close the back cover of the machine until it locks
in the closed position.
Access Denied
The function you want to use is
restricted by Secure Function
Lock 3.0.
Ask your administrator to check your Secure
Function Lock Settings.
BT Call Sign On
(For U.K.)
The BT Call Sign setting is on.
You cannot change the Receive
Mode from Manual to another
mode.
Set the BT Call Sign setting to off.
Calibration
Calibration failed.
Press and hold down to turn the machine
off. Wait a few seconds, and then turn it on
again. Perform the colour calibration again
using the LCD.
Install a new belt unit.
If the problem continues, contact Brother
customer service or your local Brother dealer.
Cartridge Error
The toner cartridge is not
installed correctly.
Remove the toner cartridge and drum unit
assembly for the colour that is indicated on the
LCD. Take out the toner cartridge, and put it back
into the drum unit again. Re-install the toner
cartridge and drum unit assembly back in the
machine.
If the problem continues, contact Brother
customer service or your local Brother dealer.
Comm.Error
Poor telephone line quality
caused a communication error.
Send the fax again or connect the machine to
another telephone line. If the problem continues,
contact the telephone company and ask them to
check your telephone line.
Condensation
Condensation may have formed
inside the machine after a room
temperature change.
Leave the machine turned on. Wait for 30 minutes
with the top cover in the open position. Then turn
off the machine and close the cover. Turn it on
again.
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