Lexmark CS748de, Service Manual

Page: 65 / 504

Diagnostic information
2-27
5026
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202.31 Paper jam at exit sensor during warm-
up.
Possible causes:
• Damaged paper exit sensor or
paper exit sensor flag
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board
• Check for anything in the paper path that might
cause the paper to jam.
• The fuser exit sensor may not be functioning
properly. Go to
“920.08—Exit sensor service
check” on page 2-103
.
203.09 During duplex printing retract, the exit
sensor is never made.
Possible causes:
• Damaged paper exit sensor or
paper exit sensor flag
• Transport belt module failure
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board
• Check for anything in the paper path that might
cause the paper to jam.
• The fuser exit sensor may not be functioning
properly. Go to
“203.09—Paper Jam error
service check” on page 2-69
.
203.14 During duplex printing retract, the exit
sensor broke early.
Possible causes:
• Incorrect paper settings
• Damaged paper exit sensor or
paper exit sensor flag
• Faulty fuser
• Faulty system board
• Ensure proper media is set for the type of paper
used.
• The fuser exit sensor may not be functioning
properly. Go to
“920.08—Exit sensor service
check” on page 2-103
.
203.15 During duplex printing, the exit sensor
never broke.
Possible causes:
• Damaged paper exit sensor or
paper exit sensor flag
• Obstructed duplex
• Faulty fuser
• Faulty system board
• Duplex motor failure
• Faulty bin full sensor
• Check the duplex paper path for damage that
would obstruct the print. If damage is found,
replace the front door assembly. See
“Front
door assembly removal” on page 4-108
.
• The fuser exit sensor may not be functioning
properly. Go to
“920.08—Exit sensor service
check” on page 2-103
.
• The duplex motor may not be functioning
properly. Go to
“146.xx, 148.xx—Motor (MPF/
duplex) error service check” on page 2-55
.
• Check the bin full sensor and bin full sensor flag.
203.20 During duplex, the page entered the
duplex path before the previous page
cleared the path.
Possible causes:
• Defective input sensor
• Faulty system board
• Wrong media size selected
• Defective exit sensor
• Check for anything in the duplex paper path that
might cause the paper to jam. This includes the
paper guides in tray 1.
• If clearing the paper jam does not fix the
problem and the paper is fan-folded, replace the
front access assembly. See
“Front door
assembly removal” on page 4-108
.
• If clearing a paper jam does not fix the problem,
go to
“920.06—Input sensor service check”
on page 2-101
.
• Make sure the selected media and media
definitions match.
• Check the exit sensor.
Error code Description Action