Konica Minolta bizhub C658 Service Manual page 1664

bizhub C658/C558/C458/C368/C308/C258
(2) Troubleshooting procedure
Procedure Section
1 Original Type
2 Original direction
3 User Settings -> Auto
Color Level Adjust.
16.3.25 Abnormal image
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
[1] Data on the previous page
(2) Troubleshooting procedure
Step Section
1 When original glass is
being used
When DF is being used:
1st side
2 When original glass is
being used
When DF is being used:
1st side
3 DF-704 or dual scan
document feeder is being
used: 2nd side
4 DF-704 or dual scan
document feeder is being
used: 2nd side
5 DF-704 or dual scan
document feeder is being
used: 2nd side
6 Service Mode -> Self-
diagnostic
Check item
Select [Copy setting] -> [Original Type] and change the
setting, and the image trouble is eliminated.
Change the direction in which the original is placed.
This eliminates the trouble.
Select [Utility] -> [User Settings] -> [System Settings] ->
[Auto Color Level Adjust.] and the image trouble is
eliminated.
[1] [2]
Check item
None of the terminal pins of the connection cable
between the CCD board (CN3 or PJ3) and the MFP
board (CN1) is bent and a positive connection is made.
Replace the connection cable between the CCD board
and the MFP board. This eliminates the trouble.
bizhub C368/C308/C258:
Faulty connector connection the CIS power supply unit
(J1), relay connector (P6), main body connection
section (P1) and DC power supply (CN4).
bizhub C658/C558/C458:
Faulty connector connection the DF power supply
(CN1), relay connector (CN117), main body connection
section (CN46) and DC power supply (CN004).
bizhub C368/C308/C258:
Faulty connector connection the CIS module (J221),
dual scan image processing board (CN1) and MFP
board (CN22).
bizhub C658/C558/C458:
Faulty connector connection the CIS module (J101),
dual scan image processing board (CN2, CN1) and
MFP board (CN24).
Replace the connection cable between the CIS module
and the dual scan image processing board. This
eliminates the trouble.
Select [Service Mode] -> [State Confirmation] -> [Self-
diagnostic] -> [Check All] and perform the function.
Then, "NG" appears.
K-336
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES
YES
YES
NO
[2] Data on the next page
Result
NO
YES
NO
YES
YES
YES
YES
NO
Action
Correct the setting.
Change the original direction.
Readjust.
• Change the original direction.
• Make the setting according to
the type of original. (If the
original contains a colored
area at its corner, colored
area detection NG may
result.)
Action
Reconnect the connector.
Replace the connection cable.
• Replace the CCD unit.
(bizhub C368/C308/C258
bizhub C658/C558/C458)
• Replace the MFP board.
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
Reconnect the connector.
Reconnect the connector.
Replace the connection cable.
Take relevant action
corresponding to the check item in
which "NG" has appeared.
• Replace the CIS module.
(bizhub C368/C308/C258
bizhub C658/C558/C458)
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