Konica Minolta bizhub C658 Service Manual page 1654

bizhub C658/C558/C458/C368/C308/C258
Step Section
5 Image check
(3) Engine troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Photo conductor section
(4) Scanner troubleshooting procedure
Step Section
1 Original
2 Original Type
3 When original glass is
being used
4 Parts along scanning
path
5 When DF is being used
6 • When DF is being
used: 1st side
• When DF-629 is
being used: 2nd side
7 DF-704 or dual scan
document feeder is being
used: 2nd side
16.3.15 Back marking
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Check item
• Select [Service Mode] -> [Test Mode] ->
Pattern]. Select "SINGLE", "HYPER", "Gradation",
"1-Sided", "CMYK", "600dpi", and "Normal", enter
"10" for CD width, "10" for FD width, and "64" for
Density, and load tray 2 with A3 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 is evident.
Check item
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.
Dirt or foreign matter on the photo conductor of the PH
of the color which is responsible for the abnormal
image.
Check item
Original is folded, bent, or raised.
Select [Copy setting] -> [Original Type] and change the
setting, and the image trouble is eliminated.
Original glass tilts.
Mirror, lens, light guide or reflectors is dirty.
DF does not lie flat.
Document reading glass tilts.
CIS glass or CIS cleaning brush is tilted.
K-326
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
[Lattice YES Go to engine troubleshooting
procedure.
NO Go to scanner troubleshooting
procedure.
Result
YES Clean the PH window.
C368/C308/C258
C558/C458)
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.
• Replace the drum unit.
NO Replace the PH unit.
C368/C308/C258
C558/C458)
Result
YES Change the original.
YES Correct the setting.
YES Corrected to the correct position.
YES Clean.
YES • Adjust the DF height.
• Replace DF if it is deformed
YES Corrected to the correct position.
NO • Replace the LED exposure
• Replace the CCD unit.
YES Corrected to the correct position.
NO Replace the CIS module.
C368/C308/C258
C558/C458)
Action
Action
(bizhub
/ bizhub C658/
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
(bizhub
/ bizhub C658/
Action
(DF-704 / DF-629 / Dual scan
document feeder)
or hinges are broken.
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
(bizhub
/ bizhub C658/