Lexmark X940e Owners Manual

Diagnostic information2-245
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After image
The ghost appears on the media which, may be the image from the previous page or part of the page 
currently printing.7
Check the printhead assembly.
Replace the printhead assembly.
Go to “Printhead assembly removal” on page 4-104.
Does the error continue?Go to step 8. Problem solved.
8Check the upper printer engine card assembly.
Replace the upper printer engine card assembly. 
Go to “Upper printer engine card assembly removal” 
on page...

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4Check the upper printer engine card assembly.
Replace the upper printer engine card assembly. 
Go to “Upper printer engine card assembly removal” 
on page 4-88.
Perform a print test.
Does the error continue?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page 4-84.Problem solved. Step Check Yes No 

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Background (fog)
Step Check Yes No
1Check the media condition.
Load new, dry, recommended media.
Re-print the defective image.
Does the error continue?Go to step 2. Problem solved.
2Check the media transfer route.
Is the media path free of contamination or debris.Go to step 3. Remove debris 
or 
contamination.
3Check the four PC cartridges for proper installation.
Check the PC cartridge connections.
Are the PC cartridge connections free of excess...

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7Check the printhead assembly.
Replace the printhead assembly.
Go to “Printhead assembly removal” on page 4-104.
Does the error continue?Go to step 8. Problem solved.
8Check the upper printer engine card assembly.
Replace the upper printer engine card assembly. 
Go to “Upper printer engine card assembly 
removal” on page 4-88.
Perform a print test.
Does the error continue?Replace the RIP 
card assembly.
Go to “RIP card 
assembly 
removal” on 
page...

Diagnostic information2-249
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Skew
The printed image is not paralleled with both sides of the media.
Step Check Yes No
1Check printer installation placement.
Check the installation surface for irregularities. 
Check for damaged printer caster. 
Is the setup surface normal?Go to step 2. Correct the 
installation 
placement.
2Properly load media into the media tray assembly and 
ensure all guides are set correctly. 
Properly install the media tray assembly into the printer....

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6Check the registration/transport roll assembly.
Are all drive rolls on the registration/transport roll 
assembly free of contamination, wear and damage?Go to step 7. Replace 
registration/
transport roll 
assembly.
Go to 
“Registration / 
transport roll 
assembly 
removal” on 
page 4-46.
7Check the upper printer engine card assembly.
Replace the upper printer engine card assembly. 
Go to “Upper printer engine card assembly 
removal” on page 4-88.
Perform a...

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Media damage
Step Check Yes No
1Check printer installation placement.
Check the installation surface for irregularities. 
Check for missing printer foot. 
Is the setup surface normal?Go to step 2. Correct the 
installation 
placement.
2Check the media feed.
Remove the media tray assembly. 
Properly load media in the media tray assembly. 
Properly install the media tray assembly in the printer.
Re-print the defective image. 
Does the error continue?Go...

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6Check the heat roll and pressure roll.
Remove the fuser unit assembly.
CAUTION: Allow the fuser unit assembly to 
cool down.
Is there contamination or cracks on the heat roll and/or 
pressure roll?Replace the 
fuser unit 
assembly.
Go to “Fuser 
unit assembly 
removal” on 
page 4-15.Inspect the 
machine for 
obstructions in 
the media path. Step Check Yes No 

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No fuse
Step Check Yes No
1Check the fuser unit assembly installation.
Check that the levers, on both sides of the fuser unit 
assembly, are pushed down. 
Re-print the defective image. 
Does the error continue?Go to step 2. Problem solved.
2Check the media condition.
Load new, dry, recommended media.
Re-print the defective image.
Does the problem remain?Go to step 3. Problem solved.
3Check the heat roll and pressure roll.
Remove the fuser unit...

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Color misregistration
Step Check Yes No
1Replace the transfer belt unit assembly. Go to 
“Transfer belt unit assembly removal” on page 4-16.
Does the error remain?Go to step 2. Problem solved.
2Replace the transfer belt steering motor. Go to 
“Transfer belt unit assembly removal” on page 4-16.
Does the error remain?Go to step 3. Problem solved.
3Adjust the color registration (Regcon). Go to “” on 
page 4-264.Go to step 4. Problem solved.
4Replace the...