Lexmark C 950 Service Manual

Diagnostic information 2-231
  5058-030
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4Check the toner dispense motor assembly for proper 
operation.
Replace the toner dispense motor.
Go to “Toner dispense motor removal” on 
page 4-166.
 
Does the problem remain?Go to step 5. Problem 
resolved
5Check the LED printhead assembly installation. 
Install the LED printhead assembly properly, and 
perform a print test. Go to “PRINT TESTS” on 
page 3-22.
 
Does the problem remain?Go to step 6. Problem 
resolved
6Check the LED printhead...

2-232  Service Manual 5058-030  
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Solid black 
Check the media path for foreign objects such as staples, clips, scraps of media. 
Step Check Yes No
1Check the four PC cartridges for proper installation.
Check the PC cartridge connections.
 
Are the PC cartridge connections free of excess 
wear and contamination?Go to step 2. Correct and 
clean 
contaminated 
pins, or replace 
the appropriate 
PC cartridge or 
connector.
2Check the charge roll HVPS PCBA connections.
 
Is the above...

Diagnostic information 2-233
  5058-030
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Vertical lines and bands (process direction)
StepCheckYesNo
1Check the media condition.
Load new, dry, recommended media. 
Reprint the defective image.
 Does the problem remain?
Go to step 2.Problem resolved
2Is the media transfer route and the media path clear of 
debris?Go to step 3.Remove debris or 
contamination.
3Check the LED beam route.
Check for debris between the LED printhead assembly and 
the PC drum.
Check the four LED printhead...

2-234  Service Manual 5058-030  
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Horizontal white stripes or bands (side-to-side direction)   
7Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171.
 Does the problem remain?
Go to step 8.Problem resolved
8Check the LED printhead assembly.
Replace the LED printhead assembly.
Go to “LED printhead removal” on page 4-99.
 Does the problem remain?
Go to step 9.Problem resolved
9Check the upper printer engine PCBA for proper 
connectivity. Disconnect...

Diagnostic information 2-235
  5058-030
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2Are the media transfer route and the media path free of 
contamination and debris?Go to step 3.Remove debris or 
contamination.
3Check the PC units for proper connection. 
 Does the problem remain?
Go to step 4Problem resolved
4Check the 2nd transfer roller for contamination and wear.
 Is the 2nd transfer roller free of excess wear and 
contamination?
Go to step 5.Replace the 2nd 
transfer roller.
Go to “2nd transfer roller removal” on page...

2-236  Service Manual 5058-030  
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Vertical stripes  (process direction)
StepCheckYesNo
1Check the media condition.
Load new, dry, recommended media. 
Reprint the defective image.
 Does the problem remain?
Go to step 2.Problem 
resolved
2Are the media transfer route and the media path free 
of contamination or debris?Go to step 3.Remove debris 
or 
contamination.
3Check the 2nd transfer roller for contamination and 
wear.
 Is the 2nd transfer roller free of excess wear and...

Diagnostic information 2-237
  5058-030
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Horizontal stripes  (side to side direction)
7Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171.
 Does the problem remain?
Go to step 8.Problem 
resolved
8Check the RIP card for proper connectivity.
Perform a print test. Go to “PRINT TESTS” on page 3-22.
 Does the problem remain?
Problem solved.Replace the RIP 
PCBA.
Go to “RIP PCBA removal” on page 4-147.
StepCheckYesNo
1Check the media condition.
Load...

2-238  Service Manual 5058-030  
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5Replace the transfer belt cleaner. Go to “Transfer belt cleaner removal” on page 4-175.
 Does the problem remain?
Go to step 6.Problem 
resolved
6Check the heat belt and pressure roll in the fuser 
assembly for scratches or defects.
CAUTION: The fuser assembly might be hot. 
Allow the fuser assembly to cool. 
Remove the fuser assembly.
 Is there contamination or cracks on the heat belt 
and/or pressure roll?
Replace the 
fuser assembly.
Go to “Fuser...

Diagnostic information 2-239
  5058-030
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Partial lack  
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 four toner cartridges for proper installation.
Reprint the defective image.
 Is the image density normal?
Problem solved.Replace any 
empty toner 
cartridges.
3Check the LED beam route.
Check for debris between the LED printhead assembly 
and the PC drum....

2-240  Service Manual 5058-030  
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Spots  
7Check the LED printhead assembly for proper 
installation. 
Install the LED printhead assembly properly, and 
perform a print test. Go to “PRINT TESTS” on page 3-22.
 Does the problem remain?
Go to step 8.Problem 
resolved
8Check the LED printhead.
Replace the LED printhead.
Go to “LED printhead removal” on page 4-99.
 Does the problem remain?
Go to step 9.Problem 
resolved
9Check the upper printer engine PCBA for proper 
connectivity....