Olivetti d-Color MF4003 Service Manual page 531

d-Color MF4003/MF3303
Step Section
7 Fusing unit
8 Fusing unit
Scanner troubleshooting procedure
Step Section
1 Original
2 Original Type
3 When original glass is
being used: Service Mode
-> Scan Area
4 When original glass is
being used
5 When DF is being used:
1st side
6 When DF is being used:
2nd side
16.3.4 Uneven density 1
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Initial troubleshooting procedure
Step Section
1 Paper Setting
2 IDC sensor
3 Service Mode ->
Stabilizer
4 Service Mode ->
Gradation Adjust
5 Image check
1-color troubleshooting procedure
Step Section
1 Service Mode -> TCR
Level Setting
2 Write section
3 Charging section
Y119930-3
Check item
Dirt or foreign matter on paper path or separation claw of
the fusing unit.
Scratches on roller, pad, and belt in fusing unit.
Check item
Original is damaged or dirty.
Select [Copy] -> [Original Type] and change the setting,
and the image trouble is eliminated.
Select [Service Mode] -> [Machine] -> [Scan Area] ->
[Image Position: Leading Edge] and make the necessary
adjustment, and the image trouble is eliminated.
Original glass or original pad is dirty.
Original reading glass is dirty.
CIS glass is dirty.
Check item
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
IDC sensor is dirty.
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] -> [Halftone
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "CMYK", and "Full Bleed", enter "64" 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 occurs only with one color.
Check item for the faulty color
Select [Service Mode] -> [Imaging Process Adjustment] -
> [TCR Level Setting] and make the necessary
adjustment, and the image trouble is eliminated.
Dirt or foreign matter on the dust-proof glass of the PH.
Foreign matter on charging roller.
L-133
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES Clean. (Disassembling the fusing
unit is prohibited.)
YES Replace the fusing unit.
NO •
•
Result
YES Change the original.
YES Correct the setting.
NO Go to the next step.
YES Clean.
NO Replace the CIS module.
YES Clean.
NO Replace the CIS module.
YES Clean.
NO Replace the DF CIS module assy.
Result
YES Make the paper setting again on
the machine.
YES Clean.
NO Go to the next step.
NO Go to the next step.
YES Go to the 1-color troubleshooting
procedure.
NO Go to the 4-color troubleshooting
procedure.
Result
NO Go to the next step.
YES Clean the PH window.
YES Lightly wipe the surface clean of
foreign matter using hydro-wipe
(65AA-99##).
Action
Replace the high voltage unit.
Replace the base board.
Action
Action
Action for the faulty color
Service Manual