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Troubleshooting
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6
Replace WT Box It is time to replace the waste toner
box.
Replace the waste toner box (see Replacing the
waste toner box on page 141).
Self-Diagnostic
The temperature of the fuser unit
does not rise to a specified
temperature within the specified time.
Turn the machine off, wait a few seconds, and then
turn it on again. Leave the machine for 15 minutes
with the power on.
The fuser unit is too hot.
Short paper The length of the paper in the tray is
too short for the machine to deliver it
to the Face-down output tray.
Open the back cover (face-up output tray) to let the
printed page exit onto the face-up output tray.
Remove the printed pages, and then press Go.
Size Error The paper size specified in the
printer driver is not supported by the
specified tray.
Choose a paper size that is supported for each tray.
(See Paper type and size on page 2.)
Size Error DX The paper size specified in the
printer driver and the control panel
menu is not available for automatic
2-sided printing.
Press Cancel. Choose a paper size that is supported
by 2-sided printing.
The paper sizes for automatic 2-sided printing are
Letter, Legal or Folio.
The paper in the tray is not the
correct size and is not available for
automatic 2-sided printing.
Load the correct size of paper in the tray and set the
size of paper for the tray (see Paper Tray
on page 91).
The paper sizes for automatic 2-sided printing are
Letter, Legal or Folio.
Size Mismatch The paper in the indicated tray is not
the correct size.
Do one of the following:
Load the same size of paper in the paper tray that is
selected in the printer driver, and then press Go.
In the printer driver select the size of paper that you
loaded in the indicated paper tray.
Small paper
The paper size specified in the printer
driver is too small for the machine to
deliver it to the Face-down output tray.
Open the back cover (face-up output tray) to let the
printed paper exit onto the face-up output tray, and
then press Go.
Toner Error One or more toner cartridges are
not installed correctly.
Pull out the drum unit. Remove all the toner
cartridges, and then put them back into the drum unit.
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 LCD 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 LCD
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