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bizhub C4000i/C3300i
Step
Section
2
2nd transfer section
3
Service Mode -> Max
Image Density Adj
4
Service Mode -> Initialize
+ Image Stabilization
12.3.7 Gradation reproduction failure
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Troubleshooting procedure
Step
Section
1
Malfunction code
2
Paper Setting
3
Image check
4
Write section
5
Charging section
6
IDC sensor
7
Service Mode ->
Stabilizer
8
Service Mode ->
Gradation Adjust
9
Service Mode -> Max
Image Density Adj
10
Service Mode -> Initialize
+ Image Stabilization
Check item
There is a positive contact between the application
terminals of the 2nd transfer and the connection
terminals (T2) and ground terminal of the high voltage
unit.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Max Image Density Adj] and make the necessary
adjustment, and the image trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
Check item
The maintenance call mark is displayed on the panel.
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] -> [Test Mode] -> [Gradation
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "CMYK", "Full Bleed", and "12 gradations",
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 to determine which
color causes the abnormal image.
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.
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] -> [Imaging Process Adjustment] -
> [Max Image Density Adj] and make the necessary
adjustment, and the image trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
L-94
L TROUBLESHOOTING > 12. IMAGE QUALITY PROBLEM
Result
NO
Clean or correct the terminal.
NO
Go to the next step.
YES
Readjust.
NO
•
•
•
Result
YES
Perform the relevant
troubleshooting procedure
corresponding to the malfunction
code.
YES
Make the paper setting again on
the machine.
-
Go to the next step.
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
Go to the next step.
NO
Go to the next step.
NO
Go to the next step.
YES
Readjust.
NO
•
•
•
•
Action
Replace the transfer belt unit.
Replace the high voltage unit.
Replace the base board.
Action
Replace the imaging unit
that
is responsible for the
abnormal image.
Replace the PH unit.
Replace the high voltage unit.
Replace the base board.
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