Konica Minolta bizhub C658 Service Manual page 1653

bizhub C658/C558/C458/C368/C308/C258
Step Section
2 2nd transfer section
3 Paper path
4 Connector connection
5 Service Mode -> Initialize
+ Image Stabilization
(5) Scanner troubleshooting procedure
Step Section
1 Original
2 Original Type
3 When original glass is
being used
4 • When DF is being
used: 1st side
• When DF-629 is
being used: 2nd side
5 DF-704 or dual scan
document feeder is being
used: 2nd side
16.3.14 Blurred image
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
(2) Initial troubleshooting procedure
Step Section
1 Damp paper
2 Paper Setting
3 Service Mode ->
Stabilizer
4 Service Mode ->
Gradation Adjust
Check item
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,
CN2) and MFP board (CN22E, CN36E).
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Initialize + Image
[Gradation Adjust], and the image trouble is eliminated.
Check item
Original is damaged or dirty.
Select [Copy setting] -> [Original Type] and change the
setting, and the image trouble is eliminated.
Original glass or original pad is dirty.
Original reading glass or original reading glass cleaning
brush is dirty.
CIS glass or CIS cleaning brush is dirty.
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 [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Stabilization
trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Gradation Adjust] and the image trouble is
eliminated.
K-325
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES
YES
YES
YES
Stabilization] and
NO
Result
YES
YES
YES
NO
YES
NO
YES
NO
Result
YES
YES
NO
Only] and the image
NO
Action
• Replace the transfer belt unit.
(bizhub C368/C308/C258
bizhub C658/C558/C458)
• Remove the foreign matter.
• Replace the transfer roller
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
Check or clean the paper path
including the duplex section.
Reconnect the connector.
Readjust.
Replace the high voltage unit.
(bizhub C368/C308/C258 / bizhub
C658/C558/C458)
Action
Change the original.
Correct the setting.
Clean.
Replace the CCD unit. (bizhub
C368/C308/C258 / bizhub C658/
C558/C458)
Clean.
• Replace the LED exposure
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
• Replace the CCD unit.
(bizhub C368/C308/C258
bizhub C658/C558/C458)
Clean.
Replace the CIS module. (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.
Go to the next step.
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