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bizhub C4000i/C3300i
Troubleshooting procedure
Step
Section
1
Paper Setting
2
Image check
3
Service Mode -> Fusing
Temperature
4
Paper exit roller
5
Fusing unit
6
Fusing unit
12.3.18 Poor fusing performance, Offset
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
[1]
[1]
Poor fusing performance
Troubleshooting procedure
Step
Section
1
Paper Setting
2
Image check: Poor fusing
performance
3
Image check: Poor fusing
performance
4
Image check: Offset
5
Service Mode -> Fusing
Temperature
6
Fusing unit
7
Fusing unit
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] -> [Test Mode] -> [Halftone
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "Black(1PC)", and "Full Bleed", enter "255"
for Density, and load tray 2 with A4 paper. Press
the start key. This runs a print cycle.
• Check the image after printing and the abnormal
image is evident. (rough gloss)
Select [Service Mode] -> [Machine] -> [Fusing
Temperature] and lower the fusing temperature, and the
image trouble is eliminated.
Faulty pressure operation of the paper exit roller.
There is dirty or foreign matter on paper path of fusing
unit.
Scratches on roller, pad, and belt in fusing unit.
[2]
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] -> [Test Mode] -> [Halftone
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "Black(1PC)", and "Full Bleed", enter "64"
for Density, and load tray 2 with A4 paper. Press
the start key. This runs a print cycle.
• Check the image after printing and the abnormal
image is evident.
• Select [Service Mode] -> [System 2] -> [Smart
Fusing Control] and select [Prohibit].
• Check the image after printing and the abnormal
image is evident.
• Select [Service Mode] -> [Test Mode] -> [Gradation
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "8 Color", "Front Half", and "12 gradations",
and load tray 2 with A4 paper. Press the start key.
This runs a print cycle.
• Check the image after printing and the abnormal
image is evident.
Select [Service Mode] -> [Machine] -> [Fusing
Temperature] and make the necessary adjustment, and
the image trouble is eliminated.
* Poor fusing performance: Decrease the setting value
* Offset: Increase the setting value
There is dirty or foreign matter on paper path of fusing
unit.
Scratches on roller, pad, and belt in fusing unit.
L-104
L TROUBLESHOOTING > 12. IMAGE QUALITY PROBLEM
Result
YES
YES
NO
YES
YES
YES
NO
[2]
Offset
Result
YES
YES
YES
YES
NO
YES
YES
Action
Make the paper setting again on
the machine.
Go to the next step.
Return the fusing temperature to
the original one and go to the next
step.
Correct.
Clean. (Disassembling the fusing
unit is prohibited.)
Replace the fusing unit.
Replace the power supply of
fusing.
Action
Make the paper setting again on
the machine.
Go to the next step.
Return the setting to the original
one and go to the next step.
Go to the next step.
Return the setting value to the
original one and go to the next
step.
Clean. (Disassembling the fusing
unit is prohibited.)
Replace the fusing unit.
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