Konica Minolta bizhub C658 Service Manual page 1651

bizhub C658/C558/C458/C368/C308/C258
Step Section
8 Service Mode -> Initialize
+ Image Stabilization
(4) 4-color troubleshooting procedure
Step Section
1 Transfer belt unit
2 2nd transfer section
3 Paper path
4 Connector connection
5 Service Mode -> Initialize
+ Image Stabilization
16.3.13 Color spot
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
(2) Initial troubleshooting procedure
Step Section
1 Paper Setting
2 IDC sensor
3 Service Mode ->
Stabilizer
Check item for the faulty color
Faulty connector connection the high voltage unit (CN1,
CN2), MFP board (CN18, CN22E, CN36E) and PH
relay board (CN1, CN2).
bizhub C658/C558/C458:
Faulty connector connection the high voltage unit (CN1,
CN2), MFP board (CN6, CN30E, CN33E) and PH relay
board (CN1, CN2).
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Initialize + Image
[Gradation Adjust], and the image trouble is eliminated.
Check item
Dirt, scratches, or foreign matter on the transfer belt.
Dirt or foreign matter on the 2nd transfer roller.
There is dirty or foreign matter on paper path.
bizhub C368/C308/C258:
Faulty connector connection the high voltage unit (CN1,
CN2) and MFP board (CN22E, CN36E).
bizhub C658/C558/C458:
Faulty connector connection the high voltage unit (CN1,
CN2) and MFP board (CN30E, CN33E).
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Initialize + Image
[Gradation Adjust], and the image trouble is eliminated.
Check item
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
• IDC sensor is dirty.
• IDC sensor shutter does not operate properly.
Select [Service Mode] -> [Imaging Process Adjustment]
-> [Stabilizer] -> [Stabilization
trouble is eliminated.
K-323
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES
Stabilization] and
NO
Result
YES
YES
YES
YES
YES
Stabilization] and
NO
Result
YES
YES
NO
Only] and the image
Action for the faulty color
Readjust.
• Replace the drum unit.
(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)
Action
• Clean.
• 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 and 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
Make the paper setting again on
the machine.
• Clean.
• Clean or correct the IDC
sensor shutter.
Go to the next step.
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