Brother MFC 9840CDW - Manual (Page 154)

138
Toner Low
Prepare New Black(K)
Toner Cartridge.
1
1
The toner
cartridge color
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 color that is low.
Too Many Files There are too many files stored
on the USB flash memory drive. Reduce the number of files stored on the USB
flash memory drive.
Unusable Device An incompatible or broken device
has been connected to the USB
direct interface.
Remove the device from the USB direct
interface. Turn off the machine’s power switch,
wait a few seconds and turn it on again.
Waste Toner Full It is time to replace the waste
toner box.
Replace the waste toner box. (See Replacing
the waste toner box on page 188.)
Wrong Paper Size The paper in the tray is not the
correct size or the tray is empty.
Load the correct size of paper in the tray.
Error Message Cause Action