Olivetti d-Color MF4003 Service Manual page 543

d-Color MF4003/MF3303
16.3.13 Blurred image
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Initial troubleshooting procedure
Step Section
1 Damp paper
2 Paper Setting
3 Service Mode ->
Stabilizer
4 Service Mode ->
Gradation Adjust
5 Image check
Engine troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Photoconductor section
Scanner troubleshooting procedure
Step Section
1 Original
2 Original Type
3 Parts along scanning path Light guide or lens array is dirty.
4 Parts along scanning path Light guide is tilted.
5 When DF is being used
6 When DF is being used:
2nd side
16.3.14 Back marking
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Y119930-3
Check item
Paper is damp.
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Stabilization Only] and the image
trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Gradation Adjust] and the image trouble is eliminated.
• Select [Service Mode] -> [Test Mode] -> [Lattice
Pattern]. Select "SINGLE", "HYPER", "Error
diffusion", "1-Sided", "CMYK", "600dpi", and
"Normal", enter "10" for CD width, "10" for FD width,
and "255" for Density, and load tray 2 with A4
paper. Press the start key. This runs a print cycle
for C, M, Y, and K in that order.
• Check the image after printing and the abnormal
image is evident.
Check item
Dirt or foreign matter on the dust-proof glass of the PH of
the color which is responsible for the abnormal image.
Foreign matter on charging roller of the color which is
responsible for the abnormal image.
Dirt or foreign matter on the photoconductor of the PH of
the color which is responsible for the abnormal image.
Check item
Original is folded, bent, or raised.
Select [Copy] -> [Original Type] and change the setting,
and the image trouble is eliminated.
DF does not lie flat.
• CIS glass is tilted.
• Location of the shading sheet is incorrect.
L-145
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES Change paper to one just
unwrapped from its package.
YES Make the paper setting again on
the machine.
NO Go to the next step.
NO Go to the next step.
YES Go to engine troubleshooting
procedure.
NO Go to scanner troubleshooting
procedure.
Result
YES Clean the PH window.
YES Lightly wipe the surface clean of
foreign matter using hydro-wipe
(65AA-99##).
Note: Do not apply a strong force
to the surface of the charging
roller, as doing so can damage the
surface.
YES • Clean.
•
NO Replace the PH unit.
Result
YES Change the original.
YES Correct the setting.
YES Clean.
YES Replace the CIS module.
YES Replace DF if it is deformed or
hinges are broken.
YES Replace the DF CIS module assy.
Action
Action
Replace the imaging unit.
Action
Service Manual