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bizhub C4000i/C3300i
Initial troubleshooting procedure
Step
Section
1
Paper Setting
2
Service Mode ->
Stabilizer
3
Service Mode ->
Gradation Adjust
4
Image check
1-color troubleshooting procedure
Step
Section
1
Uneven pitch at 94 mm
interval
2
Uneven pitch at 50 mm
interval
3
Write section
4
Charging section
5
Connector connection
4-color troubleshooting procedure
Step
Section
1
Uneven pitch
2
Uneven pitch at 59 mm
interval
3
Uneven pitch at 259 mm
interval
4
Uneven pitch at 100 mm
interval
5
Paper path
12.3.17 Uneven gloss, Rough gloss
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
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] -> [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
Dirt, scratches, or foreign matter on the photoconductor.
Dirt, scratches, or foreign matter on the developing
roller.
Dirt or foreign matter on the dust-proof glass of the PH.
Foreign matter on charging roller.
Faulty connector connection the high voltage unit (CN1)
and base board (CN4E).
Check item
Dirt, scratches, or foreign matter on the transfer belt.
Dirt or foreign matter on the 2nd transfer roller.
Dirt, scratches, or foreign matter on the fusing belt.
Dirt, scratches, or foreign matter on the fusing pressure
roller.
There is dirty or foreign matter on paper path.
L-103
L TROUBLESHOOTING > 12. IMAGE QUALITY PROBLEM
Result
YES
Make the paper setting again on
the machine.
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
YES
• Clean.
•
YES
• Clean.
•
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
Reconnect the connector.
NO
•
•
Result
YES
• Clean.
•
YES
• Remove the foreign matter.
•
YES
• Clean.
•
YES
• Clean.
•
YES
Check or clean the paper path
including the duplex section.
NO
•
•
•
Action
Action for the faulty color
Replace the imaging unit.
Replace the imaging unit.
Replace the high voltage unit.
Replace the base board.
Action
Replace the transfer belt unit.
Replace the transfer roller
unit.
Replace the fusing unit.
Replace the fusing unit.
Replace the transfer belt unit.
Replace the high voltage unit.
Replace the base board.
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