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bizhub C4000i/C3300i
Step
Section
6
Service Mode -> Transfer
Voltage Fine Adj
7
Image check
1-color troubleshooting procedure
Step
Section
1
Write section
2
Charging section
3
Photoconductor section
4
Photoconductor section
5
Developing section
6
Connector connection
7
Service Mode -> Initialize
+ Image Stabilization
4-color troubleshooting procedure
Step
Section
1
Transfer belt unit
2
2nd transfer section
3
Paper path
4
Connector connection
5
Service Mode -> Initialize
+ Image Stabilization
12.3.13 Blurred image
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Check item
The color spots are reduced when [Service Mode] ->
[Imaging Process Adjustment] -> [Charge Voltage
Adjustment] are selected and the setting value is
increased.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Transfer Voltage Fine Adj] and the image trouble is
eliminated.
* Decrease the setting value for color spots.
• Select [Service Mode] -> [Test Mode] -> [Solid
Pattern]. Select "SINGLE", "HYPER", "Error
diffusion", and "1-Sided", enter "64" for Density, and
load tray 2 with A4 paper. This runs a print cycle of
4 colors on one sheet of paper.
• Check the image after printing to determine which
color causes the abnormal image.
Check item for the faulty color
Dirt or foreign matter on the dust-proof glass of the PH.
Foreign matter on charging roller.
Dirt, scratches, or foreign matter on the photoconductor.
There is a positive contact between the electrostatic
charger application terminals and the high voltage unit
connection terminals (Y: C4, M: C3, C: C2, K: C1).
There is a positive contact between the developing bias
application terminals and the high voltage unit
connection terminals (Y: B4; M: B3; C: B2; K: B1).
Faulty connector connection the high voltage unit (CN1)
and base board (CN4E).
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
Check item
Dirt, scratches, or foreign matter on the transfer belt.
Dirt or foreign matter on the 2nd transfer roller.
There is dirty or foreign matter on paper path.
Faulty connector connection the high voltage unit (CN1)
and base board (CN4E).
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
L-100
L TROUBLESHOOTING > 12. IMAGE QUALITY PROBLEM
Result
NO
Return the setting value to the
original one and go to the next
step.
1 to 3
Go to the 1-color troubleshooting
colors
procedure.
4
Go to the 4-color troubleshooting
colors
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
Clean or correct the terminal.
NO
Clean or correct the terminal.
YES
Reconnect the connector.
YES
Readjust.
NO
•
•
•
Result
YES
• Clean.
•
YES
• Remove the foreign matter.
•
YES
Check or clean the paper path
including the duplex section.
YES
Reconnect the connector.
YES
Readjust.
NO
Replace the high voltage unit.
Action
Action for the faulty color
Replace the imaging unit.
Replace the imaging unit.
Replace the PH unit.
Replace the high voltage unit.
Action
Replace the transfer belt unit.
Replace the transfer roller
unit.
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