Olivetti d-Color MF4003 Service Manual page 541

d-Color MF4003/MF3303
1-color troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Photoconductor section
4 Photoconductor section
5 Developing section
6 1st transfer section
7 Connector connection
8 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
16.3.12 Color spot
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Initial troubleshooting procedure
Step Section
1 Paper Setting
2 IDC sensor
3 Service Mode ->
Stabilizer
4 Service Mode ->
Gradation Adjust
5 Service Mode -> Charge
Voltage Adjustment
Y119930-3
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).
Toner bristles not even on the developing roller, resulting
in a void area.
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
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
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.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Stabilization Only] and the image
trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Gradation Adjust] and the image trouble is eliminated.
Fine colored dots evident on the left-hand side with
respect to the paper feeding direction. Or fine color spots
are evident on a particular portion in the paper.
L-143
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
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.
YES Replace the imaging unit.
NO Clean or correct the terminal.
YES Reconnect the connector.
YES Readjust.
NO •
•
•
Result
YES • Clean.
•
YES • Remove the foreign matter.
•
YES Check and clean the paper path
including the duplex section.
YES Reconnect the connector.
YES Readjust.
NO Replace the high voltage unit.
Result
YES Make the paper setting again on
the machine.
YES Clean.
NO Go to the next step.
NO Go to the next step.
NO Return the setting value to the
original one and go to the next
step.
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
Service Manual