Lexmark C792 Family, Service Manual

Page: 77 / 705

Diagnostic information
2-37
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Additional checks—horizontal lines
Light colored line, white line, or incorrectly colored line
Try one or more of the following:
•
MAKE SURE THERE IS NO DEFECTIVE PRINT CARTRIDGE
Replace the defective print cartridge.
•
MAKE SURE THE TRANSFER BELT IS NOT DEFECTIVE
Replace the defective transfer belt. For more information, see the instruction sheet that came with the
replacement part.
Step Questions / actions Yes No
1 1. Check the media condition.
2. Load new, dry, recommended media.
3. Re-print the defective image.
Does the error continue?
Go to step 2. Problem solved.
2 1. Check the media transfer route.
2. Check the media route for contamination or
obstacles.
Are there obstacles in the route?
Go to step 3. Remove
obstacles or
contamination.
3 Check the print cartridge for proper installation.
Is the above component properly installed?
Go to step 4. Inspect, clean
and reinstall or
replace the print
cartridge.
4 Check the transfer roll assembly for contamination and
wear.
Is the above component free of excess wear and
contamination?
Go to step 5. Replace the ITU
assembly.
Go to “ITU
assembly
removal” on
page 4-77
.
5 1. Check the heat roll and pressure roll.
2. 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
assembly
removal” on
page 4-63
.
Go to step 7.
6
Perform a print test.
Does the problem remain?
Contact your
next level of
support. Problem solved.