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16. IMAGE QUALITY PROBLEM
16.2.35
Printer 4-color: back marking
A. Typical faulty images
B. Troubleshooting procedure
Step
Section
1
Transfer roller unit Transfer roller is scratched or dirty.
2
Paper path
3
Fuser unit
4
5
Transfer belt unit
6
258
Check item
There is foreign matter on paper
path.
Fusing entrance guide plate is
scratched or dirty.
Lower fusing roller is scratched or
dirty.
Fingerprints, oil, or other foreign
matter is evident on the transfer
belt.
The problem has been eliminated
through the checks of steps up to 5.
Field Service Ver. 1.1 Jun. 2010
AA
A02EF4C530DA
Result
Action
YES Change transfer roller unit.
YES Remove foreign matter.
YES Clean or change.
YES Change fuser unit.
YES Clean it with the tender cloth or
paper which is dusted with the
toner.
NO
Change transfer belt unit.
Change high voltage unit.
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