Brother HL-L9200CDWT - Manual (Page 188)

Troubleshooting
181
6
Toner Low: X
(X indicates the toner
cartridge or drum unit
color that is near the end
of its life. BK=Black,
C=Cyan, M=Magenta,
Y=Yellow.) 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.
Order a new toner cartridge now so a replacement
toner cartridge will be available when the
Touchscreen displays Replace Toner.
Tray 2 Error The optional lower tray is not
installed correctly. Reinstall the lower tray.
Unusable Device An incompatible or defective device
has been connected to the USB
direct interface. Remove the USB flash drive from the USB Direct
Interface.
WT Box End Soon The waste toner box is almost full. Order a new waste toner box before you get a
Replace WT Box message.
Error message Cause Action