Olivetti d-Color MF4003 Service Manual page 534

d-Color MF4003/MF3303
Initial troubleshooting procedure
Step Section
1 Malfunction code
2 Paper Setting
3 Damp paper
4 IDC sensor
5 Service Mode ->
Stabilizer
6 Service Mode ->
Gradation Adjust
7 Image check
1-color troubleshooting procedure
Step Section
1 Write section
2 Charging section
3 Service Mode -> Table
Number
4 Photoconductor section
5 Developing section
6 Toner supply section
7 Service Mode -> TCR
data
8 Service Mode -> Max
Image Density Adj
9 Service Mode -> Initialize
+ Image Stabilization
Service Manual
Check item
The maintenance call mark is displayed on the panel.
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
Paper is damp.
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.
• Select [Service Mode] -> [Test Mode] -> [Gradation
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "4 Color", "Full Bleed", and "12 gradations",
and load tray 2 with A4 paper. Press the start key.
This runs a print cycle for C, M, Y, and K in that
order.
• 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.
Select [Service Mode] -> [State Confirmation] -> [Table
Number]. The measured value is close to the standard
value.
• Developing bias: Vdc-C, Vdc-M, Vdc-Y, Vdc-K:
close to the standard value of -800 to 0
• Grid voltage: Vg-C, Vg-M, Vg-Y, Vg-K: close to the
standard value of -1600 to 0
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 between the toner supply
motor (M4, M5) and base board (CN13E).
Select [Service Mode] -> [State Confirmation] -> [Level
History 1] and the measured value is correct.
TCR-C, TCR-M, TCR-Y, TCR-K: normal value 5 to 8%
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Max Image Density Adj] and make the necessary
adjustment, and the image trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
L-136
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
YES Perform the relevant
troubleshooting procedure
corresponding to the malfunction
code.
YES Make the paper setting again on
the machine.
YES Change paper to one just
unwrapped from its package.
YES Clean.
NO Go to the next step.
NO 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.
NO • Check the high voltage unit
•
NO Clean or correct the terminal.
NO Clean or correct the terminal.
YES Reconnect the connector.
NO Select [Service Mode] -> [Imaging
Process Adjustment] -> [Manual
Toner Add] and perform the
function.
NO Go to the next step.
YES Readjust.
NO •
Action
Action for the faulty color
and the imaging unit for wiring
and connection.
Replace the high voltage unit.
Replace the imaging unit.
Y119930-3