Lexmark C 746 Service Manual

Diagnostic information2-25
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201.08 Exit sensor is never made.
Possible causes:
• Improper loading
• Paper wrapped in fuser
• Damaged paper exit sensor or 
paper exit sensor flag
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Faulty system board
• Faulty transfer belt module• 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”...

2-26Service Manual 5026 
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201.32 Paper is jammed between the input 
sensor and the exit sensor during 
input options warm-up.
Possible causes:
• Damaged paper exit sensor or 
paper exit sensor flag
• Transport belt module failure
• Lower guide failure
• Damaged fuser autoconnect
• Faulty fuser DC cable connection
• Faulty fuser
• Input option damage
• Faulty system board• Check for anything in the paper path that might 
cause the paper to jam.
• Open input tray and clear paper jams....

Diagnostic information2-27
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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 2-100.
203.09 During duplex printing retract, the...

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230.03 During duplex printing, the input 
sensor never broke.
Possible causes:
• Obstructed duplex path
• Duplex drive failure
• Defective input sensor
• Faulty system board• Check for anything in the duplex paper path that 
might cause the paper to jam. This includes the 
paper guides in tray 1.
•Go to “230.03, 230.05—Paper Jam error 
service check” on page 2-70.
230.05 During duplex printing, the input 
sensor is not made.
Possible causes:
• Obstructed...

Diagnostic information2-29
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242.03 Pick timeout from tray 2 exceeded 
without a tray 2 sensor break.
Possible causes:
• Incorrect media setting
• Incorrect paper loading
• Incorrect media restraint setting
• Tray 2 assembly failure
• Aligner failure
• Transport belt module failure1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used in tray 2.
3. Fan media, and stack flat in tray 2.
4. Properly set media restraints in tray 2....

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242.26 While feeding from tray 2, the pass 
thru sensor is not made.
Possible causes:
• Incorrect paper loading for lower 
tray
• Incorrect media restraint setting 
for lower tray
• Paper tray 2 assembly failure
• Lower tray 3 assembly failure1. Clear away anything in the paper path that might 
cause the paper to jam.
2. Ensure the proper media is set for the type of 
paper used in the lower tray.
3. Fan the media, and then stack flat in the lower 
tray.
4....

Diagnostic information2-31
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243.03 Pick timeout from tray 3 exceeded 
without a tray 3 sensor break.
Possible causes:
• Tray 3 incorrect media setting
• Tray 3 incorrect paper loading
• Tray 3 incorrect media restraint 
setting
• Tray 3 assembly failure1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used in tray 3.
3. Fan media, and stack flat in tray 3.
4. Properly set media restraints in tray 3.
If the previous actions do...

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243.26 While feeding from a lower tray, tray 3 
pass thru sensor is not made.
Possible causes:
• Incorrect paper loading for lower 
tray
• Incorrect media restraint setting 
for lower tray
• Paper tray 3 assembly failure
• Lower tray 4 assembly failure1. Clear away anything in the paper path that might 
cause the media to jam.
2. Make sure proper media is set for the type of 
paper used in lower feeding tray.
3. Fan media, and stack flat in the lower feeding...

Diagnostic information2-33
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244.03 Pick timeout from tray 4 was 
exceeded without a tray 4 sensor 
break.
Possible causes:
• Tray 4 incorrect media setting
• Tray 4 incorrect paper loading
• Tray 4 incorrect media restraint 
setting
• Tray 4 assembly failure
• Aligner failure
• Transport belt module failure1. Remove all media present in the paper path.
2. Maker sure proper media is set for the type of 
paper used in tray 4.
3. Fan the media, and stack flat in tray 4.
4....

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244.21 Tray 4 motor stalled.
Possible causes:
• Incorrect paper loading
• Paper pick mechanism failure
• Printer option cable connector 
damaged
• Input option damaged
• System board failure1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
If the previous actions do not fix the problem, go to 
“242.21, 243.21, 244.21. 245.21, 242.30,...