Partial Dirt; Repeating Marks; Black Stripes - Lexmark C925 Service Manual

Partial dirt

Step Action and questions
1 Is there toner attached to the developer roll, especially
the lower part of the roll?
2 Check the transfer belt for defects or foreign matter
such as dirt. Are there defects on the transfer belt?
3 Replace the transfer belt. Did this fix the problem?

Repeating marks

For repeating defects,
FRU / CRU
1 Fuser
2
Transfer roll
3 Imaging unit

Black stripes

Step Action and questions
1 Is there dirt on the imaging units developer roll, or
charge roll?
2
Are there scratches on the photoconductor drum?
3 Is there dirt on the fuser belt?
4
Are there scratches on the fuser belt?
5
Are there lumps of toner on the fuser belt?
6 Print a blank white page. Are there black stripes on the
page?
see"Repeating defects" on page 2-4
Action
• Check for dirt on the fuser belt. Clean if needed.
• Check for scratches on the belt. Replace if needed.
Check for dirt or scratches on the transfer belt. Clean the roll if
needed
Note: Be careful when cleaning the dirt off the transfer roll. Be
careful to not deform the roll.
Replace the transfer roll if it is scratched.
Check for scratches of unevenness on the photoconductor drum.
Replace the imaging unit if the drum is damaged.
Look for dirt on the rolls. Replace the imaging unit if the rolls are
dirty.
Yes No
Replace the Go to step 2.
imaging unit.
Remove the dirt Go to step 3.
from the belt.
Problem Contact your
resolved. second level
support.
Yes No
Clean the dirt off. Go to step 2.
Replace the Go to step 3.
imaging unit.
Clean the belt. Go to step 4
Replace the Go to step 5.
fuser.
Remove the lump Go to step 6.
of toner.
Replace the Contact your
black LED second level
printhead. support.
Diagnostic information
5041-030
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