Olivetti d-Color MF4003 Service Manual page 540

d-Color MF4003/MF3303
16.3.11 Void areas, White spots
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
[1]
[1] Void areas
Initial troubleshooting procedure
Step Section
1 Paper Setting
2 Use in areas with low
atmospheric pressure
3 IDC sensor
4 Service Mode ->
Stabilizer
5 Service Mode ->
Gradation Adjust
6 Service Mode -> Charge
Voltage Adjustment
7 Service Mode -> Primary
transfer adj.
8 Service Mode -> 2nd
transfer adj.
9 Service Mode -> TCR
Level Setting
10 Image check
Service Manual
[2]
Check item
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Grad/Dev AC Bias V Selection] and change the
setting to [ON]. This eliminates the trouble.
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.
The white spots is eliminated 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] -> [Primary transfer adj.]
and the image trouble is eliminated.
* Decrease the setting value for white dots.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Transfer Voltage Fine Adj] -> [2nd Transfer Adj.] and
the image trouble is eliminated.
* Increase or decrease the setting value to find a specific
value at which the trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [TCR level] and set the adjustment value of all colors
to "+3".
Next, select [Service Mode] -> [Imaging Process
Adjustment] -> [Manual Toner Add], select all colors, and
press the start key. (This starts a toner replenishing
sequence.)
Then, select [Service Mode] -> [Imaging Process
Adjustment] -> [Stabilizer] -> [Initialize + Image
Stabilization] and perform the function.
Then, select [Service Mode] -> [Imaging Process
Adjustment] -> [Transfer Voltage Fine Adj.] -> [2nd
Transfer Adj.], perform the function, and the image
trouble is eliminated.
* Increase or decrease the setting value to find a specific
value at which the trouble is eliminated.
• Select [Service Mode] -> [Test Mode] -> [Halftone
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "CMYK", and "Full Bleed", enter "64" for
Density, 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.
• If the abnormal image does not recur, change
Density to "255" and make a print check.
• Check the image after printing and the abnormal
image occurs only with one color.
L-142
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
[2] White spots
Result
YES
NO
YES
NO
NO
NO
NO
NO
NO
YES
NO
Action
Make the paper setting again on
the machine.
Change the setting to [OFF] and
go to the next step.
Clean.
Go to the next step.
Go to the next step.
Return the setting value to the
original one and go to the next
step.
Return the setting value to the
original one and go to the next
step.
Return the setting value to the
original one and go to the next
step.
Return the setting value to the
original one and go to the next
step.
Go to the 1-color troubleshooting
procedure.
Go to the 4-color troubleshooting
procedure.
Y119930-3