Lexmark C920 Service Manual page 46

5056-XXX
Symptom
Poor fusing.
Toner scatter on front or back of
paper.
Paper will not feed from MPF.
Symptom
Paper frequently jams in the
finisher.
Printer only prints to bin 1 or bin 2. The finisher cables are not
You cannot clear the paper jam
message.
Pages are not stapled.
2-4
Service Manual
Action
Go to "920 - Fuser Error–Fuser Heater Trouble" on page
Check the following:
• Excessive toner buildup on the transfer belt. Clean off the toner, and
run a test print.
• Transfer belt assembly
• Transfer belt toner waste bottle
• Transfer belt separation fingers
• Fuser separation pawl
Be sure you have paper in the MPF.
Check the paper size and type. Does it match the paper setting on the
printer?
Be sure the MPF paper present sensor connector (CN16) is connected to
the CK1 daughter board. If the paper still does not feed, go to
carrying service check" on page
Cause
The finisher and printer are
misaligned.
The printer and finisher have been
moved.
Attempting to staple, hole punch,
or offset print jobs on print media
other than paper.
connected properly.
The printer driver and the operator
panel settings are different.
The cover is not closed, finisher is
against the printer, or there is
paper somewhere in the paper
path.
Attempting to staple too many
sheets.
The staple cartridge is empty.
The stapler is jammed.
2-11.
2-56.
Solution
Paper frequently jams in the finisher.
Properly align the finisher with the
printer. Align the top of the guide rail
with the line on the holding plate by
rotating the two alignment knobs
closest to the holding plate. This
action raises or lowers the guide rail,
depending on which way the knobs
are turned. The edge of the guide rail
should line up with the sticker where
the white and gray portions divide.
Restrict use of the finisher to plain
paper. You cannot hole punch
transparencies, card stock, labels, or
envelopes.
Check the cable connections.
Make sure your printer driver is set to
direct the output to the bin you want.
Printer settings selected from a
software application or driver
override default settings selected
from the operator panel.
Open and close the top cover, and
make sure the finisher is locked onto
the alignment pins. Recheck the
finisher and printer for additional
jams.
Reduce the number of pages in the
staple job. The finisher can staple up
to 30 sheets of 20 lb paper. If you
attempt to staple a larger stack of
paper, the finisher ejects the stack
without stapling it.
Install a new staple cartridge.
Check the stapler for a staple jam.
"Paper