Brother DCP-L8400CDN Basic User's Manual page 111

Error Message
1
Toner Low:X
1
(X) indicates the toner
cartridge colour that
is near the end of its
life.
BK=Black, C=Cyan,
M=Magenta, Y=Yellow
Too Many Files
Touchscreen
Initialisation
Failed
Tray2 Error
Unusable Device
Remove the
Device. Turn the
power off and
back on again.
Unusable Device
USB
Write-protected
WT Box End Soon
Cause
If the Touchscreen displays
Toner Low you can still print;
however, the machine is telling
you that the toner cartridge is
near the end of its life.
There are too many files stored
on the USB flash drive.
The Touchscreen was pressed
before the power on
initialization was completed.
Debris may be stuck between
the lower part of the
Touchscreen and its frame.
The optional lower tray is not
installed correctly.
A defective USB device or a
high power consumption USB
device has been connected to
the USB direct interface.
A USB device or USB flash
drive that is not supported/is
encrypted has been connected
to the USB direct interface.
The protect switch of the USB
flash drive is on.
The waste toner box is near the
end of its life.
Action
Order a new toner cartridge for the colour that
is indicated on the Touchscreen now so a
replacement toner cartridge will be available
when the Touchscreen displays Replace
Toner.
Reduce the number of files stored on the USB
flash drive.
Make sure nothing is touching or resting on the
Touchscreen.
Insert a piece of stiff paper between the lower
part of the Touchscreen and its frame and slide
it back and forth to push out the debris.
Reinstall the optional lower tray.
Unplug the device from the USB direct
interface. Press and hold down
machine off, and then turn it on again.
Unplug the device from the USB direct
interface (see the specifications for supported
USB flash drives in Printing from a USB flash
drive or digital camera supporting mass
storage on page 37).
Turn off the protect switch of the USB flash
drive.
Buy a new waste toner box before you get a
Replace WT Box message.
Troubleshooting
to turn the
103
B