Olivetti d-Color MF4003 Service Manual page 532

d-Color MF4003/MF3303
Step Section
4 Photoconductor section
5 1st transfer section
6 1st transfer section
7 Developing section
4-color troubleshooting procedure
Step Section
1 Paper path
2 Transfer belt unit
3 Transfer belt unit
4 Transfer belt unit
5 Transfer belt unit
6 2nd transfer section
7 2nd transfer section
8 2nd transfer section
9 Fusing unit
10 Service Mode -> Initialize
+ Image Stabilization
16.3.5 Uneven density 2
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
Service Manual
Check item for the faulty color
Dirt, scratches, or foreign matter on the photoconductor.
Dirt, scratches, or foreign matter on the 1st transfer
roller.
Faulty pressure/retraction operation of the 1st transfer
roller.
Toner bristles not even on the developing roller, resulting
in a line or band.
Check item
There is dirty or foreign matter on paper path.
Lines that can be removed by cleaning are evident on
the transfer belt. (improper cleaning)
Dirt, scratches, or foreign matter on the transfer belt.
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
Transfer belt rotates faultily.
Dirt or foreign matter on the 2nd transfer roller.
Faulty pressure/retraction operation of the 2nd transfer
roller.
There is a positive contact between the application
terminals of the 2nd transfer and the connection
terminals (T2) and ground terminal of the high voltage
unit.
There is dirty or foreign matter on paper path of fusing
unit.
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.
L-134
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
Note: Do not apply a strong force
to the surface of the charging
roller, as doing so can damage the
surface.
YES • Clean.
•
YES • Clean.
•
YES • Correct or replace the drive
•
YES Replace the imaging unit.
NO •
•
Result
YES Check and clean the paper path
including the duplex section.
YES • Check and clean the cleaning
•
YES • Clean.
•
NO Clean or correct the terminal.
YES Replace the transfer belt unit.
YES • Remove the foreign matter.
•
YES • Correct.
•
NO Clean or correct the terminal.
YES Clean. (Disassembling the fusing
unit is prohibited.)
YES Readjust.
NO •
•
•
Result
YES Make the paper setting again on
the machine.
YES Clean.
NO Go to the next step.
Action for the faulty color
Replace the imaging unit.
Replace the transfer belt unit.
system.
Replace the transfer belt unit.
Replace the PH unit.
Replace the high voltage unit.
Action
blade.
Replace the transfer belt unit.
Replace the transfer belt unit.
Replace the transfer roller
unit.
Replace the transfer roller
unit.
Replace the fusing unit.
Replace the high voltage unit.
Replace the base board.
Action
Y119930-3