Lexmark C 950 Service Manual

Diagnostic information 2-241
  5058-030
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3Check the four PC cartridges for spots or other damage 
on the drum surfaces.
 Are the PC cartridges free of excess wear and 
contamination?
Go to step 4.Replace the 
appropriate PC 
cartridge or 
connector.
4Print the print quality page suite.
 Do the spots repeat for a given color?
Replace the 
appropriate 
printhead. Go to 
“LED printhead removal” on page 4-99.
Go to step 5.
5Check the heat belt and pressure roll in the fuser 
assembly for...

2-242  Service Manual 5058-030  
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After image (ghosting) 
The ghost appears on the media which, may be the image from the previous page or part of the page currently 
printing. 
Step Check Yes No
1Check the media condition.
Load new, dry, recommended media.
Reprint the defective image.
 
Does the problem remain?Go to step 2. Problem 
resolved
2Check the four toner cartridges for proper installation.
Reprint the defective image.
 
Is the image density normal?Problem solved. Replace...

Diagnostic information 2-243
  5058-030
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Background fog  
StepCheckYesNo
1Check the media condition.
Load new, dry, recommended media. 
Reprint the defective image.
 Does the problem remain?
Go to step 2.Problem 
resolved
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...

2-244  Service Manual 5058-030  
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7Replace the four developer housings and four 
developer carriers. Go to “Developer housing (C) removal” on page 4-48, “Developer housing (K) removal” on page 4-54, “Developer housing (M) removal” on page 4-59, “Developer housing (Y) removal” on page 4-65,and “Developer carrier removal and replacement” on page 4-45.
 Does the problem remain?
Go to step 8.Problem 
resolved
8Check the transfer roll HVPS PCBA for proper 
connectivity. Disconnect and...

Diagnostic information 2-245
  5058-030
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Paper skew 
The printed image is partially rotated as a result of the media not being fed straight into the device. 
StepCheckYesNo
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...

2-246  Service Manual 5058-030  
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Media damage  
6POR the machine. 
 Does the problem remain?
Replace the 
registration/ 
transport roller 
assembly.
Go to “Registration/transport roller assembly removal” on page 4-146.
Problem 
resolved
StepCheckYesNo
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...

Diagnostic information 2-247
  5058-030
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4Check the media condition. Ensure the recommended 
media is being used. 
Load new, dry, recommended media.
Reprint the defective image.
 Does the problem remain?
Go to step 5.Problem 
resolved
5Check the 2nd transfer roller for contamination and 
wear.
 Is the 2nd transfer roller free of excess wear and 
contamination?
Go to step 6.Replace the 2nd 
transfer roller.
Go to “2nd transfer roller removal” on page 4-24.
6Check the registration...

2-248  Service Manual 5058-030  
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No fuse  
StepCheckYesNo
1Check the printer media type settings. Ensure the 
settings match the media being used. 
 Does the problem remain?
Go to step 2.Problem 
resolved
2Check the fuser assembly installation.
Check that the thumbscrews, on both sides of the fuser, 
are properly tightened.
Reprint the defective image. 
 Does the problem remain?
Go to step 3.Problem 
resolved
3Check the media condition.
Load new, dry, recommended media.
Reprint the...

Diagnostic information 2-249
  5058-030
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Color misregistration
6Check the upper printer engine PCBA for proper 
connectivity. Disconnect and reconnect all appropriate 
cables.
 Does the problem remain?
Replace the 
upper printer 
engine PCBA. 
Go to “Upper printer engine PCBA removal” on page 4-184. 
Problem 
resolved
StepCheckYesNo
1Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171.
 Does the error remain?
Go to step 2.Problem 
resolved...

2-250  Service Manual 5058-030  
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Deletions  
StepCheckYesNo
1Check the media condition.
Load new, dry, recommended media.
Reprint the defective image.
 Does the problem remain?
Go to step 2.Problem 
resolved
2Make sure the PC cartridges are properly installed.
 Does the problem remain?
Go to step 3.Problem 
resolved
3Check the 2nd transfer roller for contamination and 
wear.
 Is the 2nd transfer roller free of excess wear and 
contamination?
Go to step 4.Replace the 2nd 
transfer...