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bizhub C4000i/C3300i
[1]
[2]
[1]
White line
[3]
Color line
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
Service Mode -> Table
Number
2
Write section
3
Charging section
4
Photoconductor section
5
Developing section
6
Photoconductor section
7
Photoconductor section
8
1st transfer section
9
1st transfer section
10
Developing section
4-color troubleshooting procedure
Step
Section
1
Paper path
[3]
[4]
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 to determine which
color causes the abnormal image.
Check item for the faulty color
Select [Service Mode] -> [State Confirmation] -> [Table
Number]. The measured value is close to the standard
value.
• Developing bias: Vdc-C, Vdc-M, Vdc-Y, Vdc-K:
close to the standard value of -800 to 0
• Grid voltage: Vg-C, Vg-M, Vg-Y, Vg-K: close to the
standard value of -1600 to 0
Sharp white line or colored line is blurry.
Foreign matter on charging roller.
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).
Scratches on photoconductor.
Toner line or dirt on photoconductor. (improper cleaning)
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
Scratches or dirt on 1st transfer roller.
Toner bristles not even on the developing roller, resulting
in a line or band.
Check item
There is dirty or foreign matter on paper path.
L-89
L TROUBLESHOOTING > 12. IMAGE QUALITY PROBLEM
[2]
White band
[4]
Color band
Result
YES
NO
NO
1 to 3
colors
4
colors
Result
NO
YES
YES
NO
NO
YES
YES
NO
YES
YES
NO
Result
YES
Action
Make the paper setting again on
the machine.
Go to the next step.
Go to the next step.
Go to the 1-color troubleshooting
procedure.
Go to the 4-color troubleshooting
procedure.
Action for the faulty color
• Check the high voltage unit
and the imaging unit for wiring
and connection.
•
Replace the high voltage unit.
Clean the PH window.
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.
Clean or correct the terminal.
Clean or correct the terminal.
• Clean.
•
Replace the imaging unit.
Replace the imaging unit.
Clean or correct the terminal.
• Clean.
•
Replace the transfer belt unit.
Replace the imaging unit.
Replace the PH unit.
Action
Check or clean the paper path
including the duplex section.
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