Operation Manual

Error Message Cause Action
Supplies
Replace Drum
It is time to replace the drum unit. Replace the drum unit with a new one.
See Related Information: Replace the Drum
Unit.
The drum unit counter was not
reset when a new drum was
installed.
Reset the drum unit counter.
See the instructions included with the new
drum unit.
Supplies
Toner Low: X
(X indicates the toner cartridge
or drum unit colour that is near
the end of its life. BK=Black,
C=Cyan, M=Magenta,
Y=Yellow.)
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.
Supplies
WT Box End Soon
The waste toner box is almost full. Order a new waste toner box before the LCD
displays Replace WT Box.
Toner Error
One or more toner cartridges are
not installed or not installed
correctly.
Pull out the drum unit. Remove all the toner
cartridges, and then put them back into the
drum unit.
Too Many Trays
The number of installed Optional
Trays exceeds the maximum
number.
Reduce the number of Optional Trays.
Tray 2 Error
Tray 3 Error
Tray 4 Error
The optional lower tray is not
installed correctly.
Reinstall the lower tray.
Unusable Device
An unsupported USB device has
been connected to the USB host
connector.
Unplug the device from the USB host
connector.
Unusable Device
Remove the Device. Turn
the power off and back
on again.
A defective USB device or a high
power consumption USB device
has been connected to the USB
direct interface.
• Unplug the device from the USB direct
interface.
• Press and hold to turn the machine off,
and then turn it on again.
Related Information
• Troubleshooting
• Replace Supplies
• Load and Print Using the Paper Tray
• Load and Print Using the Multi‑purpose Tray (MP Tray)
• Replace the Drum Unit
• Clean the Corona Wires
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