Printer 4-Color: Back Marking - Olivetti d-Color MF651 Service Manual

22. IMAGE QUALITY PROBLEM
22.3.38

Printer 4-color: back marking

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 2nd image trans-
fer roller unit
2 Paper path
3 Fusing unit
4
5 Transfer belt unit
6
902
Check item
Image transfer roller is scratched or
dirty.
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.
Service Manual
Field Service Ver. 2.0 Jul. 2009
AA
A02EF4C530DA
Result Action
YES Change transfer roller unit.
YES Remove foreign matter.
YES Clean or change.
YES Change fusing unit.
YES Clean with specified solvent.
(See Maintenance.)
NO Change transfer belt unit.
Change high voltage unit/2.
Y110571-1