Olivetti d-Color MF4003 Service Manual page 542

d-Color MF4003/MF3303
Step Section
6 Service Mode -> Transfer
Voltage Fine Adj
7 Image check
1-color troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Photoconductor section
4 Photoconductor section
5 Developing section
6 Connector connection
7 Service Mode -> Initialize
+ Image Stabilization
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
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
5 When DF is being used:
2nd side
Service Manual
Check item
The color spots are reduced when [Service Mode] ->
[Imaging Process Adjustment] -> [Charge Voltage
Adjustment] are selected and the setting value is
increased.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Transfer Voltage Fine Adj] and the image trouble is
eliminated.
* Decrease the setting value for color spots.
• Select [Service Mode] -> [Test Mode] -> [Solid
Pattern]. Select "SINGLE", "HYPER", "Error
diffusion", and "1-Sided", enter "64" for Density, and
load tray 2 with A4 paper. This runs a print cycle of
4 colors on one sheet of paper.
• Check the image after printing to determine which
color causes the abnormal image.
Check item for the faulty color
Dirt or foreign matter on the dust-proof glass of the PH.
Foreign matter on charging roller.
Dirt, scratches, or foreign matter on the photoconductor.
There is a positive contact between the electrostatic
charger application terminals and the high voltage unit
connection terminals (Y: C4, M: C3, C: C2, K: C1).
There is a positive contact between the developing bias
application terminals and the high voltage unit
connection terminals (Y: B4; M: B3; C: B2; K: B1).
Faulty connector connection the high voltage unit (CN1)
and base board (CN4E).
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[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.
Faulty connector connection the high voltage unit (CN1)
and base board (CN4E).
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
Check item
Original is damaged or dirty.
Select [Copy] -> [Original Type] and change the setting,
and the image trouble is eliminated.
Original glass or original pad is dirty.
Original reading glass is dirty.
CIS glass is dirty.
L-144
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
NO Return the setting value to the
original one and go to the next
step.
1 to 3 Go to the 1-color troubleshooting
colors procedure.
4 Go to the 4-color troubleshooting
colors procedure.
None Go to scanner troubleshooting
procedure.
Result
YES Clean the PH window.
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.
•
NO Clean or correct the terminal.
NO Clean or correct the terminal.
YES Reconnect the connector.
YES Readjust.
NO •
•
•
Result
YES • Clean.
•
YES • Remove the foreign matter.
•
YES Check or clean the paper path
including the duplex section.
YES Reconnect the connector.
YES Readjust.
NO Replace the high voltage unit.
Result
YES Change the original.
YES Correct the setting.
YES Clean.
NO Replace the CIS module.
YES Clean.
NO Replace the CIS module.
YES Clean.
NO Replace the DF CIS module assy.
Action
Action for the faulty color
Replace the imaging unit.
Replace the imaging unit.
Replace the PH unit.
Replace the high voltage unit.
Action
Replace the transfer belt unit.
Replace the transfer roller
unit.
Action
Y119930-3