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C5100 Troubleshooting • 138
CHECK FUSER
320: FUSER MISSING
The fuser unit is not
properly installed.
Open the top cover and
check to be sure that
the fuser unit is
properly seated in the
printer and that the lock
levers are pushed all
the way toward the
back of the printer:
CHECK MP TRAY
390: PAPER :JAM
Paper has jammed
while exiting the MP
Tray.
Clear the jam: see
“Jam 390” on
page 135.
CLOSE COVER
316: DUPLEX COVER OPEN
The duplex cover is
open or not properly
latched.
Close the duplex
cover:
CLOSE COVER
nnn: COVER OPEN
Either the top cover
or the front cover is
open.
Be sure both the top
cover and the front
cover are firmly closed.
INSTALL PAPER
CASSETTE
430: TRAY 1 MISSING
Tray 1 is not
installed in the
printer.
Install the missing tray.
INSTALL PAPER
CASSETTE
440: TRAY 1 OPEN
Tray 1 is not properly
installed in the
printer.
Make sure the tray is
pushed fully into the
printer.
Message Meaning What to Do