Konica Minolta bizhub C658 Service Manual page 1644

bizhub C658/C558/C458/C368/C308/C258
Step Section
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
16.3.9 Color reproducibility error
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
(2) Troubleshooting procedure
Step Section
1 Damp paper
2 Paper Setting
3 Administrator Settings ->
PS Designer Settings
Check item
• 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.
• IDC sensor shutter does not operate properly.
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Stabilization
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
[Gradation Adjust], and the image trouble is eliminated.
Check item
Paper is damp.
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
Select [Utility] -> [Administrator Settings] -> [System
Settings] -> [Expert Adjustment] -> [PS Designer
Settings] and change the setting, and the image trouble
is eliminated.
K-316
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES
YES
YES
NO
Only] and the image
NO
NO
YES
Stabilization] and
NO
Result
YES
YES
NO
Action
Clean the PH window. (bizhub
C368/C308/C258 / bizhub C658/
C558/C458)
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.
• Clean or correct the IDC
sensor shutter.
Go to the next step.
Go to the next step.
Go to the next step.
Readjust.
• Replace the drum unit that is
responsible for the abnormal
image. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
• Replace the developing unit
that is responsible for the
abnormal image. (bizhub
C368/C308/C258 / bizhub
C658/C558/C458)
• Replace the PH unit. (bizhub
C368/C308/C258 / bizhub
C658/C558/C458)
• Replace the high voltage
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
• Replace the MFP board.
(bizhub C368/C308/C258
bizhub C658/C558/C458)
Action
Change paper to one just
unwrapped from its package.
Make the paper setting again on
the machine.
Go to the next step.
/