Olivetti d-Color MF4003 Service Manual page 549

d-Color MF4003/MF3303
Step Section
2 Paper Setting
3 Unclear thin line in main
scan direction
4 Service Mode ->
Stabilizer
5 Service Mode ->
Gradation Adjust
6 Image check
Engine troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Photoconductor section
4 Transfer belt unit
Scanner troubleshooting procedure
Step Section
1 Original
2 Original Type
3 When DF is being used
4 When DF is being used:
1st side
5 When DF is being used:
2nd side
16.3.21 Moire
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Initial troubleshooting procedure
Step Section
1 Original
2 Original Type
Y119930-3
Check item
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] -> [Machine] -> [LD adjustment]
and the image trouble is eliminated.
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", "FEET", "1-Sided",
"CMYK", "600dpi", and "Normal", enter "3" for CD
width, "3" 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.
Dirt, scratches, or foreign matter on the transfer belt.
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.
Original reading glass tilts.
• CIS glass or DF CIS module is tilted.
• Location of the shading sheet is incorrect.
Check item
Original is damaged or dirty.
Select [Copy] -> [Original Type] and change the setting,
and the image trouble is eliminated.
L-151
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES Make the paper setting again on
the machine.
NO Return the setting value to the
original one and go to the next
step.
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.
•
YES • Clean.
•
NO Replace the PH unit.
Result
YES Change the original.
YES Correct the setting.
YES Replace DF if it is deformed or
hinges are broken.
YES Replace the CIS module.
YES Replace the DF CIS module assy.
Result
YES Change the original.
NO Go to the next step.
Action
Action
Replace the imaging unit.
Replace the transfer belt unit.
Action
Action
Service Manual