Konica Minolta bizhub C658 Service Manual page 1658

bizhub C658/C558/C458/C368/C308/C258
Step Section
2 Uneven pitch at 28 mm
interval
3 Write section
4 Charging section
5 Connector connection
(4) 4-color troubleshooting procedure
Step Section
1 Uneven pitch
2 Uneven pitch at 64 mm
interval
3 Uneven pitch at 157 mm
interval
4 Uneven pitch at 94 mm
interval
5 Paper path
16.3.18 Uneven gloss, Rough gloss
(1) Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Check item for the faulty color
Dirt, scratches, or foreign matter on the developing
roller.
Dirt or foreign matter on the dust-proof glass of the PH.
Foreign matter on charging roller.
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).
Check item
Dirt, scratches, or foreign matter on the transfer belt.
Dirt or foreign matter on the 2nd transfer roller.
Dirt, scratches, or foreign matter on the fusing belt.
Dirt, scratches, or foreign matter on the fusing pressure
roller.
There is dirty or foreign matter on paper path.
K-330
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES • Clean.
• Replace the developing unit.
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 Reconnect the connector.
NO • Replace the high voltage
• Replace the MFP board.
Result
YES • Clean.
• Replace the transfer belt unit.
YES • Remove the foreign matter.
• Replace the transfer roller
YES • Clean.
• Replace the fusing unit.
YES • Clean.
• Replace the fusing unit.
YES Check or clean the paper path
including the duplex section.
NO • Replace the transfer belt unit.
• Replace the high voltage
• Replace the MFP board.
Action for the faulty color
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
(bizhub
/ bizhub C658/
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
Action
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558 / bizhub
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558 / bizhub
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)
unit. (bizhub C368/C308/
C258 / bizhub C658/C558/
C458)
(bizhub C368/C308/C258 /
bizhub C658/C558/C458)