Diagnostic information 2-7
7541-03x
Partial dirt
Repeating marks
For repeating defects, see“Repeating defects” on page 2-4
Black stripes
Step Action and questions Yes No
1 Is there toner attached to the developer roll, especially
the lower part of the roll.
Replace the
imaging unit.
Go to step 2.
2
Check the transfer belt for defects or foreign matter
such as dirt. Are there defects on the transfer belt?
Remove the dirt
from the belt.
Go to step3
3
Replace the transfer belt. Did this fix the problem? Problem
resolved.
Contact your
second level
support.
FRU / CRU Action
1 Fuser • Check for dirt on the fuser belt. Clean if needed.
• Check for scratches on the belt. Replace if needed.
2
Transfer roll Check for dirt or scratches on the transfer belt. Clean the roll if
needed
Note: Be careful when cleaning the dirt of the transfer roll. Be
careful to not deform the roll.
Replace the transfer roll if it is scratched.
3
Imaging unit 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.
Step Action and questions Yes No
1 Is there dirt on the imaging units developer roll, or
charge roll?
Clean the dirt if. Go to step 2.
2
Are there scratches on the photoconductor drum? Replace the
imaging unit.
Go to step 3.
3
Is there dirt in the fuser belt? Clean the belt. Go to step 4
4
Are there scratches on the fuser belt? Replace the
fuser.
Go to step 5.
5
Are there lumps of toner on the fuser belt? Remove the lump
of toner.
Go to step 6.
6
Print a blank white page. Are there black stripes on the
page?
Replace the
black LED
printhead.
Contact your
second level
support.
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